relay question
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Junior Member
Joined: Nov 2003
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From: kenosha,wi
Car: 91 z28
Engine: 305 tpi
Transmission: t700r4
relay question
can anybody tell me what readings i should see on the primary fan relay pins. I have a dual fan setup. i looking at my reading of 12v on D and F. that dont make sense to me. thanks
Bryce
Bryce
Senior Member
Joined: Aug 2002
Posts: 676
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From: Detroit, Michigan
Car: 04 Xtreme Blazer
Engine: 4.3L V6
Transmission: 4L60E
that a dual fan car?
if so,with the relay unplugged, the ecm has 12v on the trigger wire(f) until it wants the fan on, then it grounds the wire
D is 12v key on only
you should also have 12v at pin E
pin A goes to the fan(should have a resistance to ground with the relay off)
secondary fan is different, if the relay is unplugged, F will not be ground or 12v, it will read 12v with the relay plugged in
if so,with the relay unplugged, the ecm has 12v on the trigger wire(f) until it wants the fan on, then it grounds the wire
D is 12v key on only
you should also have 12v at pin E
pin A goes to the fan(should have a resistance to ground with the relay off)
secondary fan is different, if the relay is unplugged, F will not be ground or 12v, it will read 12v with the relay plugged in
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