Need help wiring manual fan switch...which wire?
Thread Starter
Senior Member
Joined: Jul 2002
Posts: 704
Likes: 0
From: Granby, Ma US
Car: 89 WS6 Formula
Engine: 305 TPI w/ some mods done
Transmission: Modified THM700R4
Need help wiring manual fan switch...which wire?
need help guys......
Can someone tell me the exact procedure for hooking up a manual fan switch for my 89 FORMULA firebird 305 with TPI. I need to know which wire to tap into. i have located the relays but need a wire diagram. Picture of my two connectors that goto the relays is below. Iam hooking up both fans to a toggle switch. I just need to know what wire Iam tapping into on each connector.
Can someone tell me the exact procedure for hooking up a manual fan switch for my 89 FORMULA firebird 305 with TPI. I need to know which wire to tap into. i have located the relays but need a wire diagram. Picture of my two connectors that goto the relays is below. Iam hooking up both fans to a toggle switch. I just need to know what wire Iam tapping into on each connector.
Supreme Member
Joined: Jan 2004
Posts: 2,322
Likes: 100
From: So. Ohio
Car: 88 Camaro
Engine: L98 350
Transmission: 700r4
Whole lot simpler. Locate the AC pressure switch on passenger side frame rail just back of the battery on the high pressure AC line. Put the toggle switch across these two wires and it will operate both fans through the relays.
Junior Member
Joined: Oct 2003
Posts: 69
Likes: 0
Car: 91 Camaro RS, BEAST
Engine: 305 TBI
Transmission: T5
I just found the single fan switch wire running from the sensor, permanently grounded it, then spliced a switch into it, and ran into the dash, looks clean and works GREAT. just dont forget to turn it on in traffic 
Last edited by 91CamaroDude; Sep 27, 2004 at 11:32 PM.
Junior Member
Joined: Aug 2004
Posts: 21
Likes: 0
From: Sevierville TN
Car: 1991 Z28 350,1980 malibu classic, 1977 Camaro
Engine: 383 475 hp, 355 450 hp
Transmission: turbo 350, 350 turbo
fan trouble HELP PLEASE!!!
Both of my fans have stopped working. When I purchased the car I noticed a red wire running from the drivers side fan to the fuse box. It looks like this has caused the fuse box to pretty hot. The guy I bought the car from said that he installed a Hypertech switch on the block but it isnt working. Neither of the fans will even come on when the air is running. The only fan that does work is the blower motor. Please help I can't even drive to town without the car overheating.
Thanks
Matt
Thanks
Matt
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