Quote:
Originally Posted by christuna
I think it's supposed to come on when the overheating sensor makes connection with the block not the other way round
Also there is a pressure switch on the a/c receiver/drier that when it shorts the fans come on at low speed
EDIT: Because your car has a 93 M104 (HFM) then it may not have an overheating sensor it may just have 2 sensors (ecu and gauge) but i'm not sure
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I thought they were soppose to default to full speed when the coolant wire is off. Either way the ac on or high temp they don’t come on at all. Has 3 sensors. 1 2 and the 3 pin. I have zero power going to the fans at all