Question about 1994 Mitsubishi 3000GT

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Main cooling fan does not turn on. Engine over heats

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Have you checked the fan motor. if so and it checks out fine then i would check a fuse or the wires to make sure they are not cut or frayed. if that doesn't work check the thermostat to make sure it is functioning properly.

Posted on Mar 04, 2009

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Overheating when I sit idle.


Over heating the engine is a serious concern. With the hood raised you should hear the motorized fan turn on just behind the radiator as the engine requires additional cooling.. If you look in from the rear of the radiator you should see the fan blades.

This electric powered motor operates on a thermostat and when the engine temperature rises this fan should come on. I'm assuming from your description that when driving and air is flowing through the radiator as the car travels the engine is nor overheating.

Check fan motor thermostat, check fan motor and check wiring.

Wiring Diagrams related to the Honda Civic
http://www.wiringdiagrams21.com/category/automotive/honda-automotive/civic

Motor engine cooling fan only runs as engine temperature requires additional cooling.
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Jan 05, 2016 | 2001 Honda Civic

1 Answer

Who doesn't the engine cooling fan turn on


check the plug connector at the rad cooling fan motor for a bad or damaged connection. then you can run jumper wires from the battery to the terminals on the fan motor itself. if it does not run then the fan motor needs replacing. this is a common problem.

Sep 20, 2014 | Cars & Trucks

1 Answer

Cooling fan starts when switch on the engine, and the fan stops when i switch off the engine


cooling fan mainly turns on when your ECM senses that your engine is getting hot and there is no wind cooling down the coolant to cool your engine it usually kicks on when your idling or driving at low speeds to pull in the wind to cool the coolant. the fans don't need to turn on when the engine is off

Jun 01, 2013 | 2006 Mitsubishi Lancer

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

91 honda accord fan stars when you shut off engine


There are two fan switches on that car;
The main one turns the fan on and off when the ignition is on and the car is running.
The second switch powers the fan if the ignition is off and the engine temperature is too high, to cool the engine off if it was just shut down.
It sounds like your main fan switch has gone bad and needs to be replaced since it's not sending any signal to the fan, while the engine is running.

Oct 22, 2012 | 1991 Honda Accord

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

3 Answers

Cannot get cooling fans to turn on for radiator???


The cooling fans won't run until either the engine coolant temperature reaches about 218 degrees or the air conditioner/defroster are on. Once the engine reaches appx 218 degrees the fan will come on and run until the coolant temperature drops a few degrees and will then turn back off. If either the a/c or defrost are turned on then the cooling fan will begin to run to remove the heat from the a/c system and should stay on until either is turned off. If the engine is overheating in slow or stop and go traffic then the fan may not be working at all due to a bad fan motor or blown fuse.

Nov 12, 2010 | 1997 Chevrolet Lumina

2 Answers

Why does the fan keep running on 2005 jetta after turning off


You are talking about the thermo electric cooling fan, its operation is independent of the car's electical system. It is switched on and off by the engine temperature. When you park, the engine heat soaks upward to heat the thermostat turning the fan on. It will run until the engine cools down and the thermostat switches it off. Quite normal operation.

Apr 19, 2010 | 2007 Volkswagen Jetta 2.5 Sedan

1 Answer

I have a 2000 Lexus LX470 that is heating up. After having replaced and or serviced the entire cooling system I have concluded that the cooling fans are not staying on or coming on long enough to bring the...


the fan relays are inside the main engine compartment junction box. and the fan "switch" is a function the the engine computer. it looks at engine speed vehicle speed and coolant temperature to decide whether to turn the fans on or not. I doubt its the ecu, most likely the fan relays.just pull them out and put new ones in.

Sep 28, 2009 | 2000 Lexus LX470

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