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relay question

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Old Jun 3, 2004 | 06:19 PM
  #1  
bp91z28's Avatar
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Joined: Nov 2003
Posts: 67
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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
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Old Jun 3, 2004 | 08:03 PM
  #2  
Dave Y's Avatar
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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
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