Question about 1998 Toyota Corolla

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Main cooling fan not working - 1998 Toyota Corolla

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Follow the wire from the fan back until you find the fuse box or receptacle plug, using a fuse tester, check the fuse for damage,

Posted on Aug 07, 2010

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What causes both cooling fans to not run?


Hi Naomi , there is a lot involved in the control of the cooling fans on your vehicle ! There are three fuse's , three relays an a fan control unit !
1. radiator fan main relay , located in underhood relay box A
2.condenser fan relay , located in underhood relay box A
3.radiator fan relay , located in underhood relay box C
4.Cooling fan fuse # 47 20amp. underhood fuse / relay box
5.condenser fan fuse # 50 20amp in underhood fuse / relay box.
Any one of these could cause them to not work, rather then just replacing parts an wasting money you should take it to the repair shop !

Apr 06, 2015 | 1997 Acura RL

1 Answer

2002 jeep sport. Overheating while at idle. Changed radiator, thermostat, water pump. Only runs cool when ac is on. What next?


relay that controls the speed of the radiator cooling fans must be checked
Air conditioning works when theAir conditioning works the relay is stuck ON for the fans cool two radiators (ac + main radiator)

Sep 15, 2013 | Cars & Trucks

2 Answers

My cooling fan will not turn on. What could this be? I had someone tell me the water pump, but it does not leak.


Step 1:

This cooling fan circuit has 2 cooling fans and 2 cooling fan relays, both cooling fan relays are located in the BJB (battery junction box, underhood fuse box) there is a low speed or main cooling fan relay in cavity location # K-46 and the high speed relay is location # K-47! Also check the main cooling fan power fuse # 2 in the same BJB, The fuse is a MAXI-FUSE (large one) it is blue in color and is rated at 60amps!

Step 2:

Also check the coolent tempature sensor thats what signals the fan to turn on.

Step 3:

Do the fans turn on when you turn the a/c on. if not may have bad fan motor

Feb 27, 2013 | 1998 Ford Contour

1 Answer

Cooling fan does not run?


At the main fuse and relay box, check the 30A EGI INJ fuse. If OK, the main relay closes to apply power to the cooling fan relay. Next, check the 30A FAN 1 and FAN 2 fuses.If OK, power is being applied to the fan control module. The PCM processes engine coolant temperature sensor input and sends a signal to the fan control module which, in turn, causes the cooling fan motor to operate. Fan failure could be caused by malfunction of the cooling fan relay, the fan control module, the engine coolant temperature sensor, the cooling fan motor itself, or the PCM

Oct 06, 2012 | 2005 Mazda MPV

2 Answers

Which cooling fan is the primary on a 99 jeep grand cherokee ???


The main cooling fan on this 1999 jeep cherokee, the main fan all depends.

These jeeps come with diffrent fan set ups. Here are a few, the first may be a fan driven off the motor by a fan belt and a another fan which is electric. the primary fan used for cooling is the fan that runs off the engine with a belt. the other electric fan is more the air conditioning system, this fan is used for cooling the condensor mainly. the engine driven fan is for the cooling system.


Another system fan set-up on these jeeps would be the motor driven fan by belt with another electric fan in front off it, the diffrence between the first and this one is that the first fan system is side by side and this one is set-up one in front of the other but the concept is the same, the fan driven by the engine is mainly for the cooling of the engine coolant and the electric fan is for air conditioning cooling.

In both set-ups the electric fans also help the cooling system but are mainly used for the help in cooling when the a/c is turnned on, the a/c condensor builds up heat the same as the radiator does, one fan is unable to cool both the radiator and the condensor, this is why some cars have two fans.

Good day, hope this is helpful,

Mar 18, 2012 | Cars & Trucks

1 Answer

Cooling fan not working/ 1999 Kia Sephia...I checked the fan...needs to be replaced but also no power from the plug the fan is connected to


The fan is powered by multiple control points. The first thing to check is fuse for cooling fans. If fuse is good then check the fan relay(s). After making sure those 2 items are good then check temperature sensor on the engine. Those are the main items that control cooling fans. Some vehicles are also controlled through the ECM.

Oct 10, 2011 | 1999 Kia Sephia

1 Answer

COOLING FAN DOES NOT COME ON. CHECKED ALL FUSES AND RELAYS. AN REPLACED COOLANT TEMP SENSOR. FAN WORKS WHEN AC IS ON


The main fan and the fan that comes on with the a/c being on are on different circuits. Your main fan might be dead if you replaced coolant sensor and checked the fuses. Do you have a volt meter or a test light?

May 16, 2011 | Oldsmobile Alero Cars & Trucks

1 Answer

2006 bmw 750li, radiator cooling fan not running when engine hot, I have replaced the sensor or switch, in the lower radiator hose with new, fan will not come on still. is there a fuse that might be...


the cooling fan fuse is located in the main fuse panel,location of which should be in your owners manual if you have one if not call the dealer and ask.it could be the cooling fan motor itself not working or the cooling fan relay.to check the cooling fan if you disconnect the plug on the back of the motor and feed direct power and ground to the terminals of the motor.if the fan starts to work then it is okay.to change the cooling fan it is a job for a shop to do as it entails alot parts removal to get to the fan itself

Mar 30, 2011 | 2006 BMW 750Li

2 Answers

What if the fan don't work?


check main fuse black box under the hood. look for a main fuse or relay bad. also the fan could be bad, try running the engine to operating temperature,. then look at the fan under hood to see if it's turning. the only way to be sure if fans turning is to see it turning. if you turn the key on, do you hear it come on? when cool? it should'nt come on until the engines warm!! the a/c fan will come on when you turn the air conditioner on, or it should. check for blown fuses in main fuse box under the hood in black box. thank you for choosing fixya.com

Nov 30, 2010 | 1994 Buick LeSabre

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