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Post Info TOPIC: 88 relay wiring


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88 relay wiring


I'm trying to wire in a electric fan from a 88 firebird into a 65 fullsize. I know where the big red wire and the big black wire goes.
What I need is where the tan/white wire goes as well as the green/white goes.One powers the relay the other is the ground switching wire.

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Pontiac. The Generals' outlaw division.


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 You have the answer in your own question!!!! The tan/wht will be ignition and the the grn/wht is the ground feed from the ECM. (computer) Or in your case, get a thermally actuated switch that screwed into the intake water jacket out of an older GM, before the ECM controlled days, and wire the grn/wht to it.

 They normally "ground" at about 108 degrees C.

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Vincent Jr.



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Thank you for the clarification. Just didn't want to fry relays with the hit and miss approach.

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Part Number (GM) 3040674 used to work like a darn - button type connector single contact - but is actually discontinued from GM - can be purcahed thru - Resale - from GM dealer or check wit the jobber see if they can cross that number


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1967 Beaumont Custom

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If you want the fan to turn on sooner, there is a switch that grounds around 200 degrees F if I remember right. I used one of them in my 94 Impala SS because the first fan only came on about 225 F and that's too warm by my thinking.

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1966 Strato Chief 2 door, 427 4 speed, 44,000 original miles



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Carl Stevenson wrote:

If you want the fan to turn on sooner, there is a switch that grounds around 200 degrees F if I remember right. I used one of them in my 94 Impala SS because the first fan only came on about 225 F and that's too warm by my thinking.




I would love the part # if you can recall , or the application and I can cross it with STANDARD.   I used one with the electric fan and relay for my hotrod , kept the box for the part # ,, I can't find it now?



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later...rog

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I'm a collector...not a builder!!Located in sunny central Saskatchewan at the lakehead!
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