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electric fan on my camaro not working.. please help!!!?
I have a 1996 chevy camaro with the 3.8 V6. It is equipped with the dual electric fans. The problem is, their not turning on when they should. Actually, they are not coming on at all. My car is not overheating but it's not very hot out yet and I'm already noticing when I stop the car starts getting hotter then it should. The fans just will not come on. I have put in a new 180 thermostat (factory being 195) and flushed and refilled the entire system.
Is there a sensor that tells the fans when to turn on and off?
Please help me, the hot wheather is coming!!
Another question.
At what temp does the fans turn on/off?
I own a shop, and think this; The fans have two different purposes. One is called the engine cooling fan, and the other is called a AC condenser fan. Turn on the AC unit, and they both should come on then. If not, then you may have a bad main relay. The engine cooling fan only comes on when the engine reaches about 208 degrees. The fan should have power to it with the ignition switch on, and as the engine gets hot, the temperature sensor closes, thus giving the fan a ground, and it comes on. Suspect the sensor is bad. The fans have two relays. One is a main relay that controls both fans, and the other is the engine cooling fan relay. When the temp sensor gets a ground, it sends this ground to the latch part of the relay, the latch pulls in, thus giving the fan a ground, and it comes on. The fan motor may be bad if it has power, and ground to it. Check first the fuses, and suspect it may have two fuses for the fans, so check all of them. Next check the relays to make sure they are acitvating. You can check these (out of the car) with a nine volt battery by jumping two of the pins in it. It can't harm anything if you hook it wrong, so just touch it to two of them at a time until you hear it click. Then the other two terminals are the ones you will check to make sure they are carrying the load. You can check these with an ohms meter. Also take a good look at the sockets the relays plug in to, look for corrosion, and/or bad connections as it will look burned, so clean them good. You can test the temp sensor by placing it in a pan of water on the stove, and hooking an ohms meter to it. Just as the water begins to boil, you will notice the sensor will begin to read on the 1 scale of the meter. The sensor you are looking for should be near, or in the thermostat housing. With the ignition switch on, you should be able to ground the wire that goes to the sensor, hear a click, and the fan come on. The click will be the relay working, so if you don't hear a click, then the relay is probably bad. If you hear the click, and the fan doesn't come on, then you probably have a bad fan motor, but check the wiring between the relay and the fan before you buy a new fan motor.
One other thing, if your engine is supposed to use a 190 degree thermostat, then use a 190 degree thermostat. The newer vehicles are designed to run this hot, and it can cause other issues by not running what it calls for in it. If the engine runs too cold, then you may start to see trouble codes pop up in the computer system, or running problems with the engine.
Glad to help out, Good Luck!!!
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