cooling fan test
06-24-2006, 12:19 AM
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cooling fan test Does anyone know how to force the fans to come on? I am trying to test the wiring and relays as wiring the fans to the battery spins them pretty well. I never see the fans come on yet I have a new sensor. The guage never gets above 210 but when I turn it off after stop n go driving it boils over. This dosent see to happen on highway trips, and the temps stay lower. The service book I have is pretty useless as it only shows how to diagnose an lt1 not an ls1.
06-24-2006, 12:39 AM
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You have to ground a wire on the fan relays. I believe it was a pink wire, but it has been too long for me to remember for sure. Try a search on the free fan mod.
06-24-2006, 01:28 PM
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You can pull the a/c high pressure switch plug (right by the firewall), and jumper 2 of the pings in the plug with a piece of wire. I forgot which 2 it is, but it will make the fans come on. I can't remember if the car needs to be running/key on or what though.
I'd thought about making a manual fan switch this way, but never got around to it. The fans stay on a few seconds after you remove the jumper too.
I'd thought about making a manual fan switch this way, but never got around to it. The fans stay on a few seconds after you remove the jumper too.