First off, I've done a search..and haven't found exactly what I'm looking for.

I have the Dual Fan set-up on my 91 Z28 Camaro. When I bought the car, the guy wired the passengers side fan so it runs all the time..which is cool. But, I'm wanting to put a switch in so I can run the secondary fan (drivers side) when ever it get's really hot. If I turn the AC on, the secondary fan kicks on, which is normal, but I never run my air and I just want to be able to flip a switch and turn it on and off. I have seen some different schematics and pictures..and I don't really understand those. I was told that I could actually splice into the relay located by the brake booster and run a switch. The problem is...is that I don't know which relay it is and second I don't know which wire to splice into.

If someone can tell me which relay and wire to splice into, I could just hook the switch up to that wire and ground it. Can anyone help and give me some details? Thanks

 

https://www.thirdgen.org/techbb2/sho...n+relay+switch

the color of the wire i spliced into for my passengers side fan relay was grey because it was coming from the fan switch.

thats the relay all the way on the right of the three next to the brake booster.

so the drivers side fan relay must be the one on the left.

the the furest left relay of the three is the fuel pump relay.

https://www.thirdgen.org/techbb2/sho...n+relay+ground

so i guess the drivers side fan relay ground signal wire is dark green most likely.

https://www.thirdgen.org/techbb2/att...postid=1384183