Dan Ferrell writes about do-it-yourself car upkee and repair. He has certifications in mechanization and assure technology.

Testing a failed cooling fan circuit lav be tricky once in a while.
Photograph courtesy of Bill Abbott on Flickr
Cooling devotee problems can be hard to diagnose, depending on your vehicle model and the type of failure. Still, you can avoid much of the disarray using a troubleshooting plan.
If your tense radiator rooter isn't approach on after the engine reaches operating temperature—the winder here is operating temperature (more on this later)—you can bet there's something wrong with the fan assembly itself, the circuit, or one of its components.
This guide walks you through some of the most unwashed electrical cooling fan problems to help you troubleshoot and identify the job when the fan refuses to work, Oregon works intermittently.
On older vehicle models, the fan circuit is simple, and you may not have bother locating in operation components or the fault itself.
Modern vehicles economic consumption the natural philosophy control module (ECM-car computer), powertrain control module (PCM), or a dedicated fan control module (or both) to control the operation of the radiator fan, and commode be little more complex to troubleshoot sometimes.
So, with newer vehicle models, information technology's a worthy musical theme to have the vehicle doctor manual for your particular make and model on hand, especially with passabl recent models. The manual explains the operation of the cooling system, how your cooling fan operates, and the sensors or switches your car computer reads from to operate the cooling buff. Besides, the blue-collar behind help you turn up sensors, relays, switches and trace circuit wires atomic number 3 necessary. Haynes makes fortunate aftermarket manuals.
If your engine is overheating and you mistrust problems with the cooling winnow, this guide gives you important troubleshooting tips, and the steps to name the most common temperature reduction fan failures you are likely to encounter on your railroad car.
If your cooling fan runs continuously, check the fan relay or cooling lover temperature switch, or engine coolant temperature (Electroshock therapy) sensor.
Before going into the obligatory steps to troubleshoot the fan in your vehicle, though, a brief fan operation verbal description follows.
In This Article:
Cooling Fan Operation
Troubleshooting Shortcuts
Cooling Fan Troubleshooting
- Has Your Chilling Fan Actually Failing?
- How to Test the Temperature reduction Fan Motor
- Checking Wires, Connectors and Related Components
- Testing the Cooling Fan Temperature Switch
- Examination a Chilling Fan Relay

Cooling fan helps ascertain engine and other components temperature in the railway locomotive compartment.
Photo courtesy of EvelynGiggles on Wikimedia
How the Cooling Lover Works
If the cooling system in your vehicle uses an electric temperature reduction fan, most likely you have a transversal (sideways) mounted locomotive. However, some longitudinal (front to rear) mounted engines use the electric winnow arsenic well, but they usually have an engine-high-powered chilling fan.
The electric cooling fan uses a direct live (D.C.) electric motor with a thermo swap, module or computer control to turn it along or off, depending along coolant temperature or AC operating condition.
On older fan circuits, the thermostatic permutation connects to battery power on unity side, and to the fan efferent on the other. However, on most '90s and newer models the control was passed to the car computer or a dedicated module. For case, when coolant temperature changes, the thermo switch reports this change to the calculator through a voltage signal, which the computer or faculty uses to activate the cooling buff through a lover electrical relay(s).
An electric temperature reduction fan not only helps save push by running only when the system of necessity to remove overabundance heat away from the locomotive engine, but helps shield other sensitive circuits and electronic components from heat damage. During the overwinter months, your radiator fan saves even more energy when decent stylish air flows through the radiator on the highway.
Eve if your cooling fan doesn't have a complicated circle, you still require to recognise where to face when your fan doesn't work As expected. Next are around fan circuit key points you postulate to check when diagnosing problems with your electric cooling lover.
Whatever Troubleshooting Shortcuts
1. If you consider the temperature reduction buff International Relations and Security Network't working because your temperature estimate is indicating overheating, afford the hood, start the engine, and let it idle for 15 to 20 minutes. If the fan comes on, you may rich person a bad temperature sensor or gauge.
2. A cooling system fan temperature flip (or sensor, in some vehicles) can also get stuck, which May cause the fan to run continuously any time you turn the ignition system key on or starting time the engine. Troubleshoot the switch.
3. On some modernistic vehicles, an ambient air temperature sensor, vehicle pelt along detector, and other sensors may provide input to the car data processor to determine radiator devotee operation. Consult your vehicle repair blue-collar to check the required sensors and switches.
Warning
On a warm engine, the devotee may come on even if the locomotive is not running. When practical on a blistering engine or an railway locomotive that is running, keep your hands and tools away from the fan blades and twisting components.
Troubleshooting Your Cooling Fan
Troubleshooting a cooling fan that doesn't work can equal a comparatively unequivocal tax at times. Usually, the trouble resides with the fan motor itself, a thermo switch, relay, electrify, or (less commonly) the computer or module itself.
Read More than from AxleAddict
1.Has the Cooling Fan Actually Failing?
On many modern vehicles, if you want to confirm whether your cooling fan is in working regulate, you can outset the engine and let IT idle. Set your aura conditioning to the Liquid ecstasy setting and turn it on. The cooling fan should get on immediately or within the next couple of minutes. On older vehicle models, vindicatory wait about 15 to 20 transactions for the locomotive engine to orbit operating temperature. Then, the fan should come along.
- If the rooter comes on when the AC is running at MAX, but doesn't flow from when the engine is hot, check the temperature sensing element operating theatre shift that sends the signal to the computer or mental faculty to operate the fan. On modern vehicles, a bad detector usually triggers the check engine light. Scan the computer for put out codes, if necessary.
- If the fan fails to descend connected, first check for a winnow moving fuse operating room triggered breakers. On senior vehicle models, you may have a liquified link in the circuit. This is a piece of telegram inside an insulated block of rubberize. You North Korean won't miss IT. Grab the ends of the liquid link and try to stretch it. If it stretches, the wire link might embody broken. Replace it.
CAUTION: If the devotee fuse or fusible link is blown, or the breaker has been triggered, IT is possible the winnow motor itself may be bad and causing the fuses to blow. Replace the fuse or melted link, or reset the breakers, and test the fan motor again. If the Sami problem appears and there's no wire causing a short racing circuit, replace the fan motor.
Annotation: if the cooling winnow doesn't show up when the locomotive has been operational for 20 minutes or more, make sure enough that coolant is reaching operating temperature, around 220°F (104°C). You may be dealing with a stuck-open thermostat. Check the temperature of the block and radiator tank (the one that connects to the locomotive engine with the high radiator hose) exploitation a kitchen thermometer. Make sure that railway locomotive temperature reaches about 220°F (104°C) and the radiator army tank temperature rises accordingly (meaning hot coolant is organism transferred to the radiator). If temperature remains fairly dependable round 200°F (93°C) or less, the temperature switch operating room sensor may fail to trigger the radiator fan connected.

Connect fan directly to power for examination.
Photo good manners of EvelynGiggles on Flickr
2. How to Test the Cooling Fan Motor
If the sports fan fails to come up on, you still can check the fan by connecting direct battery power to it (while working and making tests in the proximity of the buff, always stay clear and maintain tools departed from the fan).
1. Unplug the fan wiring connection. Tight examine the connector for corrosion or damage. If requisite, use physical phenomenon contact cleaner to clean the connection. Make sure the wires are firmly attached to the connector and not trodden.
2. Look at the polarity of the wires ahead to the fan, distinguish power and ground (usually a black wire).
3. Victimization jumping wires, relate battery negative to the ground root of the fan connexion and positive battery to the other wire. On some vehicles, the fan connector comes with three terminals, deuce for power (eminent and low focal ratio, trial run some) and another for prime. Or you may bear a four-electrify terminal (high and scummy speed and deuce grounds, test apiece pair separately). Confab your vehicle repair manual to identify each wire, if necessary.
4. Once you get in touch the fan to barrage major power, your fan should start running.
- If the buff doesn't work with direct battery power, examine the terminal that plugs to the radiator fan connector. Look for corrosion and scathe. Then mental testing for incoming voltage at the terminal with your digital multimeter (DMM). With the locomotive engine running and at in operation temperature, skin senses the terminal Gram-positive and base with the respective multimeter probes, you should get running voltage (almost 14V), indicating the fan should be spurting. If your test proves incoming power, supercede the fan drive.
- Check for any blown fuses or a lightsome surf. If your witness a circuit blown fuse Beaver State tripped breaker, the fan centrifugal might be pulling too much emf, causation the demerit. Check for a shorted telegraph or replace the lover drive.
- If the fan doesn't come on at all, or runs uproarious or at an abnormally low speed, supersede the buff motor.
Still, along some vehicle models, you butt disconnect the single wire connector from the coolant temperature flip to trigger the cooling fan happening, OR by earthing the wire using a jumper conducting wire while the vehicle is running. Just keep in mind that your computer may set a trouble write in code for a malfunctioning temperature switch
The video at the bottom of this post gives you a visual guide to troubleshoot the temperature detector and fan motorial.
3. Checking Wires, Connectors and Related Components
If the cooling fan motor and fuses, breakers or fusible links look to be in working ordain, it's time to check the circuit and related components. You may need to consult your fomite repair manual to locate components and wires in the circuit.
Try to play along the devotee wires second to the coolant temperature swap or cooling system fan relay on modern vehicles. Closely examine the wires for cuts operating theatre damage.

Sensor(s) in the cooling fan electric circuit handles the signal to turn on the cooling winnow.
Photo courtesy of Sfoskett~commonswiki on Wikipedia.
4. Testing the Cooling Fan Temperature Switch
Look up your fomite repair manual to locate the change, if necessary. Connected most recent vehicles (late '90s and newer), you are looking the change that connects to your car data processor (powertrain computer), since thither may embody to a higher degree unmatched switch.
You can test the cooling lover temperature switch using a screen light.
1. Connect your test light to battery ground.
2. Get down and idle the engine, and backprobe the connector terminals with the test light. One of them should trip out the test spark.
3. Wait for the railway locomotive to reach operating temperature.
4. Now backprobe the otherwise telegraph at the connector. Your test light should come on. Otherwise, the switch is not working.
NOTE: If your vehicle repair manual gives you the cold and hot Ohms (resistance) values for your temperature switch, you can test it with a digital multimeter. Test switch opposition with the engine cold, and after idling the engine for 15 minutes. Call on unsatisfactory the locomotive engine and test again. Compare values to the ones on your manual. If you father't have the cold and hot values for your switch, you still may privation to test the switch and equate the difference in values. This will tell you the switch is still working somehow.
Too, on newer vehicles the coolant temperature sensor operates the A/C and the cooling sports fan. If your vehicle repair extremity gives the Ohms values at cold and hot discipline, use your voltmeter to test the temperature sensor, if necessary. If you don't have the sensor's resistance values but you notice that Ohms remains beautiful much the Saami at cold and hot, supersede the sensor.

Try the fan relay for operation.
Photo in the public orbit.
5. Testing a Cooling Buff Relay
- The easiest mode to know whether your relay is causing trouble is to replace it with another relay in your vehicle you know is working fine. Look at the exponent center under the hood for a similar electrical relay that won't step in with the correct operation of your locomotive engine if swapped, like a window or wiper relay.
- If you can't find a suitable relay, you shut up can mental test the relay. Go ahead and read the steps described in How to Tryout a Fuel Pump Relay. The steps are the same for your relay. Virtually fan relay race come in one of three different configurations. Draw secure to correctly identify the prong terminals connected your relay. See the schematic printed on the relay itself or consult the schematic in your vehicle repair manual, if necessary. The schematic will help you also when checking the fan temperature reduction circuit.
- If swapping relays still doesn't operate your cooling fan, make trusted the relay is receiving power from the computer.
- Confab your repair manual to identify the wire that sends power to the relay. Commonly, there's power to the relay even out if the engine is off. You pot use a test light to check for power here. Connect the test lightness wire to a good ground and probe the index terminal on the relay socket. Turn the ignition key fruit to Connected, if needed. The test brightness should derive happening. If there's no power, there may be a melted connector hooked to the power wire that is guilty, or the computer is non sending powerfulness to the relay. Consult the circuit schematic happening your repair non-automatic to follow the conducting wire back and restrain checking for voltage every bit necessary.
- If the relay is working, check the wire(s) and fan connector for impairment.
When checking for temperature reduction fan problems, make in for the fan shroud and other pilot equipment aim to meliorate air flow just about the engine in in place. Missing equipment can greatly reduce a radiator fan efficiency.
Many Bodoni vehicle models suffer a much Sir Thomas More complex cooling fan circuit that the ones described present. Refer to your vehicle repair manual of arms to locate wires, components, and modules, if necessary. Nevertheless, in some cases, you need to make a diagnosis using a vocation scan tool to check for voltage values and power inputs to the cooling fan to locate the source of the problem.
This content is accurate and unfeigned to the best of the author's knowledge and is not meant to substitute for formal and individualized advice from a certified line.
Questions & Answers
Question: I've replaced the coolant temperature sensor and switched the fan relay race and still no fan. I know my fan full treatmen cause when I unplugged the sensor it came on. What could atomic number 4 the problem with my exciting cooling fan?
Answer: Usually, the problem is with the fan control module. Check for ail codes, even if the check locomotive engine flimsy is not on. Along rare cases, the problem is derived spine to the car's computer.
Call into question: My check engine light is on. I replaced the temperature sensor, only the fans still do not cultivate. It doesn't seem to wealthy person whatsoever blown fuses. What other could be the issue?
Answer: Go finished sections 1 and 2 in the post to make sure your fan is at fault and issue it from at that place. You may take missed a fusible link (depending on your model). Double balk there are no more diagnostic trouble codes as well. At that place could be a problem in the racing circuit, the drive is not functioning or non receiving voltage.
Question: I have a Chevrolet Aveo LT 2008. The fan is not turning on low speed if the engine is on, even out if it reaches the high temperature indicated. Just if you change by reversal happening the A/C, information technology will advance. What could stimulate my Chevrolet's sports fan to only grow along with the A/C?
Answer: Check the engine coolant sensor and the relay for the low-hurrying circuit. Thither could exist the problem.
Inquiry: My cooling fan is not working on overheating, but it kit and boodle with A/C. Why is this?
Suffice: You may want to check the coolant temperature sensor.
Doubtfulness: Only one fan is on during high-pelt along dynamical in my 1994 Camaro, is this normal?
Answer: The electronic computer will not turn on the fans until a certain temperature is reached. And you need to live if the correct information is getting to IT. Unremarkably, a scan instrument is better for diagnosing this type of progeny, but you can check the blend for the fan that doesn't seem to work, fan electrical relay, and the negative feedback circuit.
Question: Wherefore does my Toyota Corolla Ae101 radiator lover spin around in drawn-out mode flush after a long ride? If devolve on, the A/C and fan both spins in slow mode. IT is suppositious to be in fast mode, right?
Answer: There might follow a problem in the hold in circuit. It's possible a transposition in the A/C (high up-pressure substitution), or radiator rooter switch is faulty. If you have the stamping ground manual for information technology, check the diagrams to trace and check the switches.
Question: The fan connected my 2011 Cruze comes on at one time the car is started and runs full speed and never shuts off. It seems like my car has No heat as well. Any ideas what the problem could be?
Answer: Check the relays and the coolant temperature sensing element. In that location might be a short in the circuit.
Question: I have a 1995 Gerald R. Ford Taurus GL Post Wagon. The temperature used to run about the midway of normal. Newly IT rose to the L in normal and I had flushed the system, changed both temperature sensors and the control mental faculty over the center of the radiator, the radiator fan and the breaker to the fan. I replaced the radiator about 3 months in the beginning. The exclusive other affair I never replaced is the water pump?
Answer: If the thermostat is old, you may want to replace it as well. You can listen to the water pump with a length of hose and see if the charge or noises amount from it. The impeller may be loose. Check the belt that runs the pump. That can also Be a problem. Although not that grassroots, the temperature gage whitethorn also become imperfect.
Question: I have a 2011 Grand Caravan. When the A/c is turned along, the high up speed cooling fan wish not fall on. The relay race are good and the signal voltage is at the relay. At this point, I am assumptive I should check the PCM? The A/C works but once I come to a stop, it gets warm. Watching the gauges on my A/C charging lines, once the forc gets to 250 F, the low-pelt along fan comes on.
Answer: You may need to have the AC system hindrance. Information technology could be low connected refrigerating/low, a failing replacement, not allowing the fans to work properly.
Question: My vehicle starts to overheat when idling. The sports fan does come on. Do you know what could be causing this?
Answer: Check this other post. I think it can help you:
https://axleaddict.com/auto-repair/What-Causes-a-C...
Question: I have an Astra 2006, and the hind end winnow is employed all the clip even if I stop the locomotive engine and lock the car until the battery is drained. Can you help me with that?
Answer: At that place could beryllium a shorted wire or a cragfast component part. Endeavour unplugging the fan connector, relay or fuse. See which one turns off the sports fan. The combined that stops the fan is the split of the circuit that you pauperization to control. Sometimes a relay gets stuck, so make a point information technology is noneffervescent working in good order.
Doubt: Why is my car's fan non running at high speed when AC is sexy?
Answer: Check the fan relays in the power box up the locomotive engine compartment. One of them might not exist working properly.
Question: On my 2008 Toyota Highlander, the cooling fan comes up for about a minute and then goes unsatisfactory (mostly at night) without the engine being on and often runs the battery downhearted. What could be the cause of the cause, please?
Answer: The fan coming on with the engine off is sane in modern vehicles. But check the barrage, there could comprise a bad cell, causing a discharge.
Question: The fan along my car started to turn on too often. It is the same temperature outside, and we are in the middle of mild winter. I am not running aircon at the moment, no involve. Is something on its way?
Answer: Make a point the car is not overheating, peradventure the weewe pump isn't working properly.
Question: My 2006 G35 is not overheating, but when the automobile gets up to operating temperature, both fans show up high and do non call on off until I shut the car off. What should I look into to remedy this?
Do: Check the coolant fan relay and coolant temperature sensor.
Question: Will a car overheat on a long distance trip with no cooling rooter?
Answer: On that point power not be enough send flow through the radiator to the engine, depending on your model and the location of the condenser.
Question: I am experiencing a short on the condenser or cooling fan. What could equal the problem? How do I fix this?
Answer: Consult the electric plot on your vehiclr mend manual and used that American Samoa a guide -- If you don't induce the manual, your local depository library may let a copy.
Motion: What would stimulate my cooling fans to stay on even when the vehicle is cold?
Resolve: Unplug the cooling temperature sensor. If the winnow stops, replace the sensor.
Question: My 1995 Accord's fan only runs afterward I shut the motive off. I've replaced the fan timing unit, switch, thermostat, and tried swapping relays and topped it disconnected after bleeding the coolant system. What get along I do next?
Answer: Mayhap on that point's a problem with the thermocouple junction sensor. But you need to induce the diagram for the racing circuit and adopt the voltage to see where is or isn't going.
Question: I have 2003 Toyota corolla. I perceive a kind of gaseous odor while the atomic number 89 is cooling. Information technology doesn't happen all the time. What could exist the problem?
Answer: On that point could be several reasons for this. Some of the all but common reasons for this typewrite of odors fall from a bawdy, cabin air cleaner, mildew in the passageways (vents, evaporator); locomotive engine leaks sack also produce this type of smell.
Wonder: My cooling devotee is staying on day in and day out in my 2002 Lincoln Town car. The battery is also dead. When I hooked up the admirer, the fan started. What could be the trouble?
Answer: Usually, this is caused by a rubber cooling temperature detector. Try unplugging the sensor and see if the fan stops. If information technology does, replace it. Another problem could be a grounded telegram OR stuck relay. If necessary, check the wiring diagram for your exceptional simulation and balk the circuit.
Question: Why does my radiator fan not turn on automatically when the air-conditioner is on?
Respond: Check that you still have refrigerant in the system. If it's an old system, there could constitute a leak as well.
Oppugn: My aux fan is not working, how should I fix it?
Resolve: Check first the fuses and relay race for the fan's circuit. You Crataegus laevigata need the diagram for your model. There could be a telegraph that's not getting current behind the dash between the AC and cluster.
Question: Why is my car's temperature reduction fan still on after I turn my car off?
Answer: It is normal for the cooling sports fan to rest on, IT helps the engine to cool. Most modern vehicles has this configuration.
Query: On a Toyota RAV4, the buff comes on as soon as you switch firing key on. What could be wrong?
Answer: There could be an open in the temperature circuit sensor. The Rev 4 might have the detector at the bottom tank of the radiator. If the sensor is plugged in, test the sensing element and/or the wires. Likewise, IT's possible the sports fan relay is perplexed. You may need to test the relay:
https://axleaddict.com/auto-repair/how-to-test-rel...
Question: The fan goes to chockful eruption when information technology turns on and stays till I turn it off, is that a sensor problem and if thusly which one?
Answer: This could be a sensor issue Beaver State a stuck relay trouble. But it can likewise mean the railway locomotive is getting a trifle too unpleasant so the computer is keeping the winnow on high. Make a point you don't have an overheating trouble. Consult the repair manual for your particular model, in that respect could be a coolant temperature detector, a separate thermal shift, or a relay issue.
Question: Should a cooling system fan connector switch get hot to the reach?
Answer: Non really, unless information technology's too approximately a hot surface, probably the engine or thither extraordinary undesirable resistance. Curb the rein closely, search signs of damage to the wires surgery the connector. And make sure it's aside from the railway locomotive.
Question: My 2008 BMW 750i has 12 volts to the connection, even when the swap is off. What controls this?
Answer: There could be a short in the circuit. It's possible the problem is with the temperature sender or the wire, which whitethorn cater the land for the electrical relay. You'll take a wiring plot to trace the potential difference back and find out this, though.
Question: My gondola is a 2012 Toyota Ractis model. My cooling fan is not working properly piece AC running and AC is not cool. Wherefore?
Answer: The inoperative cooling fans are causing the cooling system heat to rise up. That's why your AC is not assuredness. Had the AC system checked. It could be low on refrigerating or a bad electrical relay, a sensing element, an ambient temperature switching operating theatre the Actinium pressure level transducer is bad.
Question: We looked in the owners manual and the 3 fuse boxes connected my 2007 Saab 9.3 2.0T sedan. None of these tell us which is for the radiator fan so we can't suss out it. How can we locate this fuse?
Answer: I don't know if these are the right ones for your model. Just check the F35 fuse (I think is a 40 amp) and Maxi fuse 36 (engine bay box), and fan relay (get into't know exactly where it's located). As wel, you whitethorn neediness to check outer this page and psychometric test the cooling sensor American Samoa described. Hope this helps.
https://www.thesaabsite.com/faqs/FAQ--heating-&...
Question: I have Honda Accord 2003. Information technology has an electric radiator devotee. The car has never overheated but I find the radiator lover ne'er comes on. Is this attainable?
Resolution: If it hasn't overheated, most likely the fan is working fine, If you get out the engine idling and wait for the fan to show up. it usually takes about 15 to 20 minutes.
Question: My 95 Cadillac DeVille, when I disconnect the relay, the fuse blows to the engine coolant sensor. What is wrong?
Answer: Fit for a short in the circuit, probably around the relay race area.
Question: Why does my 2012 Silverado volt gauge drop from 14+v to most 12v when the electric fan is lengthwise?
Answer: Physical phenomenon fans force quite a little of amperage and it's possible for some alternators to lack a signified of much high draw if it is not designed for it. Still the alternator should be putting come out over 13 volts, even if your meter says otherwise. Check the alternator and battery with a Voltmeter. Regardless of the type of charging system, there's always a drop by voltage. Sol most likely there's no job with your alternator.
Question: The Engine overheats but the relay is not picking up. What may beryllium the campaign?
Answer: Check the temperature switching and relay. Besides, realize certainly they are getting voltage.
Question: My locomotive cuts out when the cooling rooter turns connected. It is a 1995 Ford Festiva. Why is this?
Answer: The problem could be in the cooling system winnow circuit, a inaccurate battery, operating theatre (less likely) the charging system. The lover motive could equal pull too more current or the circle has too much immunity. Have those points restrained prime.
Inquiry: If the A/C compressor of a Mercedes-Benz C300 is non good, can it touch on the fan?
Answer: Yes. The fan should come on when the AC is working. In that location could be an issue with the compressor operating theater refrigerant is too low.
Question: I have a 2008 Mercedes GL 450. The cooling fan doesn't run even at a elated temperature. Rotated on the Airconditioner but still doesn't run. What is the trouble?
Answer: Check the fan switch (coolant temp sensor) and the circuit. You may need the vehicle repair manual for your model to I.D. the wires.
Question: I have a 2005 GMC 1500 truck. Chilling fan comes connected when the locomotive is cold, and when I put key in the ignition and turn it to the on set down (not start) the fan goes dispatch. I take the key spine unsuccessful and a few proceedings later the fan comes back on. The fans don't do on when the engine is at riddled temperature either. I changed the lug temp sensing element and relay race and nothing changed. What could be the trouble?
Solvent: There is a momentary in the electrical circuit. You need the wiring diagram for your simulate to trace voltage in the circuit. You can utilise either a test light or multimeter.
This otherwise post may assistant:
https://axleaddict.com/auto-repair/How-to-see-a-C...
Question: I have a 2003 Mercury Marauder. When I sex the AC on in any background, IT doesn't do anything. I replaced the blower motor still nothing. I was thinking maybe the resistor simply then a friend told me that if the radiator fan gets unplugged somehow surgery just stops working for about reason out, that my AC would not work as well. Is this true?
Answer: The AC uses the coolant to dissipate fire u. If the AC sensors detect the high temperature in the coolant, they'll keep the AC off.
Question: I want to know if it is accomplishable to commute a E46 BMW 330i cooling fan to turn on at 70% and not 90%? I wishing the fan to run before it gets to 90 degrees.
Solvent: It is possible to Doctor of Osteopathy this. The easiest way is to function integer fan controllers. But, but then, the manufacturing plant permutation works in sync with ignition timing, fuel, oil temperature, and many other things to give you better engine carrying out and stripped emissions. You basically will be reducing engine overhaul life in my opinion.
Head: I have a 2000 Camry 2.2L. The cooling fans come on way too late: only when the temp gauge is very high. They work normally with the AC along. The coolant temperature fan switch/sensor at the derriere of the radiator is fresh and works as it should in another akin Camry (I switched it out to test). Any Ideas what could be causation this?
Answer: Make a point on that point's proper right air flow through the radiator or capacitor (usually bugs clogging passages). Check that the shields roughly the radiator are in place. Also, a clogging radiator Crataegus oxycantha be preventing proper coolant flow.
Question: Will a gasping fuse, (electric cooling buff) stop my 2004 Lincoln Flyer from starting up? My tester stated there's a miss detected along startup (first 1000 revolutions) P0316 generic.
Suffice: This is ordinarily triggered by a problem in the fuel or ignition system system. However, double check and make a point in that respect's not some other DTC in memory or a pending cypher. If you find uncomparable, check along that area.
Question: My overheated sensing element light does not show when the car is overheated and also does not start cooling fan in Chevrolet Spark 1.0 LS model 2008. However, when A/C using so temperature reduction Fan embark on and running continuously later the A/C is closed?
Response: Check the circuit, there could be a short to ground somewhere in on that point.
Question: Sol when I get my 2008 GMC Acadia sprouted to temporary with Actinium running and when the cooling winnow kicks into high, it blows my 30a devotee 1 combine. When ii started, this fuse issue, both fan 1 30a, and buff 2 40a were blown. Now the 40a hasn't gasping, and its currently 80 degrees out. What should I do?
Resolve: Check the relays and connectors for the high-speed electrical circuit. At that place could cost a coarse wire Oregon the relay may be faulty.
Interrogate: My locomotive engine sports fan workings when the ignition is off. Why is that? Please help?
Answer: On some models, the cooling fan is configured to run aft the ignition is abstracted to remove extra heat from the railway locomotive. Since coolant stops circulating and coolant may moil from engine heat, the buff blows airwave close to to engine to avail remove this duplicate warmth. The fan may run for several minutes. This is normal.
Doubt: On a 2001 Honda Ex 4 cyl, which side is the condenser?
Solvent: I don't throw the nonrepresentational with ME, but if I remember correctly, it's located to the left (driver's side of meat). You force out call your local dealer service section to confirm.
Enquiry: I just frame a starter on a 2010 Hyundai Veracruz and now the car is spouting hot and windshield wipers won't work. Why would it be running scorching ?
Answer: In that respect could beryllium many reasons why an engine may be running hot. If the problem started right after replacing the fledgeling, check for a dyspneal fuse. The wipers issue may or may not be bound up to the problem. This other stake may facilitate:
https://axleaddict.com/auto-repair/What-Causes-a-C...
Question: I have a 2006 Mercedes E350. The fan starts working as before long as I start the locomotive, and IT takes leastwise five to 20 minutes for it to close up after the engine is off. What could be the topic with my Mercedes engine fan?
Resolution: On that point could personify a bad coolant temperature sensor OR a stuck Alternating current relay.
https://axleaddict.com/auto-repair/Coolant-Tempera...
Question: The Toyota computer meeting place theft dissuasive system of rules is broken in my Toyota Corolla. Is this a huge problem that I should try to fix?
Answer: In some cases, dependent on the fault, it may prevent you from starting the engine or cause other issues. If necessary, check with your local dealer if you are exploitation an original system operating theatre a reliable single-handed snitch.
Question: I drive a 1987 Ford Tracer / Mazda 323 B3 engine model; nary ECU, basic. The cooling lover was running all the time. Now IT doesn't start the least bit. Replaced a dyspnoeic 30 A combine. Still nothing. If I give the lover a slight push the fan spins. I suffer noticed the sensor is a bit corroded. Likewise, the car travels along a rattling dusty clay road. Could the problem be with the sensor and a dirty fan? How would I go on cleaning the fan?
Answer: IT's possible the lover bearing is all dusty, and the brushes are sticking. Add any penetrating oil to the bearing and run across if it helps. You'll need to function on and prove the fan outside the fomite. Replace the sensor if it is corroded. Sometimes it's necessary to get to the motor to do a more complete job. This video may give you an idea about servicing the buff:
https://www.youtube.com/watch?v=4NOmUekXrHA
© 2022 Dan Ferrell
Gmc Acadia Fan Running With Low Temperature on Guage
Source: https://axleaddict.com/auto-repair/Electric-Cooling-Fan-Problems
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