the car is overheating and the fans are not on... i jumped the aldl with a paper clip to see if they would come on but they still didnt,, so does that mean i need a relay or a new fan switch,, i have a hypertech one in there now.
thanks

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1988 GTA Trans Am 350tpi: 44k miles,3:27 BW rear, aftermarket t-tops
Hotchkis: subframe connectors & strut tower brace
Flowmaster: 3inch exhaust& dual chamber muffler
Accel: 8.8mm wires, cap&rotor, u-groove spark plugs
Edelbrock: 52mmTB, intake & runners
K&N: filtercharger
TPIS: 170* stat, afpr, mat relocation kit
March: performance crank and alternator pulleys
Hypertech: 176* fan switch
Other mods: ported plenum, gutted cat, tb coolant bypass, flux capasitor

 

A simple test to prove there is nothing wrong with the motors or wiring is to turn your A/C on. As long as the vehicle is not travelling faster than 37 mph, #1 Fan will turn on when the A/C is on.

 

Glen is right, as soon as the pressure builds up for the ac system, the fan should automatically come on. If this is the case, you have a bad Fan Switch. If it still doesn't come on, then most likely it's a bad relay, but might also be the motor(s).

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My 91 RS
Nor-Cal Crew For Life

 

There are many possible faults, on the dual fan cars. Best way to make sure the fan motors are good is jump them from the battery with homemade jumbers. Also check the relays, ground the green/white wires and see if the fans come on. Best thing to do is go the the electronics message board area and search for DUAL FANS. I went through this recently. Good luck

 

how many fan relays are on my car? 1 or 2?

 

Ron,

How many fans are on your car? (Hint: There is a relay for each fan, since they are controlled independently.)

The fans are also protected by fusible links in the positive battery voltage supply line, just in case the relays are O.K. I would be surprised if BOTH relays failed at the same time, or both fan motors for that matter. Both fans, hovever, share a common grounding point, so don't overlook that possibility.

Good luck.

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Later,
Vader
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"I cannot take this any more... Saying everything I've said before..."
Adobe Acrobat Reader 4.0
KaleCo Auto Parts

 

well i put the ac on and the fans didnt come on, i changed 1 relay, and the fuses and fan switch are intact.. so whats next?

 

well i jumped the fans and they came on, so the motors are fine, the relays are new, the fuse is ok,, so its the fan switch right?????

 

Ron, if you suspect the fasswitch, do this.....

Unplug it.

Take a jumper wire from the wire you just unplugged, to a clean, shiny ground location.

Turn the key on (no need to start the car) and the fans should come on.

This will be bypassing the fanswitch, and should turn the relays on, if possible, listen to them for a slight "click", if they click on, (and since both are new), I'd look inside the flat connector I told you about the other night, both fans grounds tie together in that connector....assuming you have 12volts at the fan motors...then you're looking for a bad ground.

 

this blows, the stock switch is back in and the fans are still not comin on,, the car is at pep boys now and those morons have no idea what is wrong. mike, what flat connector???? where is it located exactly?// hurry up cause if this dosent get fixed i cant take my car to school tomorrow

helpppp

 

can it be the CTS???