Question about 1996 Ford Escort 4 Door

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What suplies power to coolin fan relays? Then what do the relays send to? Just the Fan?

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The ignition switch supplies power. At the relay (with the switch on) you should have power at two different spots. #30 and #85. Then # 87 goes to the fans. #86 goes the engine control module(ECM). The ECM grounds out #85 to energize the relay, to turn the fans on. The ECM reads the signal from the coolant temperature sensor. Possibilities are, bad wiring, bad fan/s, bad ECM, bad relay, and a bad switch. And I believe on your car there is a resistor located by the fans that go bad. I would check this first.

Posted on May 08, 2014

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Get yourself a wiring diagram ,of at least the
circuits your working on

Have a local repair shop print what you need,
then you can do your own testing

Posted on May 08, 2014

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Hi.

The car model was not included in the question. In general if the radiator fan is not starting the first thing to check are the fuses. Depending on the car's model there is one or two fuses in line with the cooling fan circuit. If there are two fuses, then one is in the fuse plate inside the car, the other one is under the hood.

The next part to test is the thermostat. The thermostat housing is located on the refrigerant fluid lines, either near to the radiator, or near to the engine block. The thermostat can be tested using VOM tool. Read either Ohms or volts to find out if the thermostat is closing the fan circuit when the engine is hot.

Most fan circuits use also relay. Variable speed fans have often more than one relay. The fan relay(s) is often located under the hood. Relays can be tested reading volts at their contacts or swapping the relay with one of the same kind.

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My coolin fan doesn't kkick on when the engine heats up an my car wants to shut off what can be the problem?


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My coolin fan for my engine wont run? how do i fix it? 98 ford mustang gt


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hope this help you.

send mr your comments thansk

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1 Answer

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On my 2000 Jimmy when I'm at low speeds in the city it usually blows quite warm out of the heater (not always). But suddenly it will quit blowing any heat at all. On the highway it just blows cold. The...


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Finaly, my english isn't good, because I speak in spanish, but if my bad english solves your problem, i'm geting so well. I working every day in electronics cars, and that is the basic metod of analyse that I use.

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