I would like to get my 88 IROC-Z's secondary fan to kick on at the same time my primary fan comes on around 220 degrees. I talked with my mechanic about the primary and secondary fan relays and he showed me using some temporary connectors that if the green and white wire in the primary fan relay is cross connected with the green and white wire in the secondary fan relay, that I can achieve my goal. He told me to melt off a bit of each green/white wire coating and wrap a new piece of wire between the two, and then tape around the new connections where live wire is exposed. Is this something that can be done safely, or is it recommended to avoid this setup? I don't want to burn out any relays, switches or my fans. I also would don't want an engine fire, I've already replaced that 350 once, and that was more than enough for me. The other thing is if this is OK to do, what type of wire should I use for the cross connection, and is there any other details I am missing for proper installation? I am pretty numb when it comes to electrical stuff so I apologize if this question seems foolish.
Thanks
JCRULZ

 

No one here has any input on this matter? There's got to be someone out there that has tried this or heard of it at least!

 

I'm pretty sure there are schematics in the sticky at the top to do it.

Personally I don't like the idea of both fans coming on at the same time simply because of the peak voltage draw during initial turn on. I prefer to stage them about 5° apart. Or really any amount of degrees apart.

I really like the 200°/185° fan switch. A simple install and it avoids dealing with electrical hacking. Keeps the car cool enough for any hot climate. But doesn't run things too cold if you drive it in the wintertime either.

 

JC, you can also splice into the green/white wire at each fan relay and connect a wire to a toggle switch and the other to ground and you are set, 1 toggle switch for each relay. This works great on my `88 Iroc with a 383. I left the stock fan switch in case I forget to watch the temp gauge. I also connected an LED to each fan relay so I know when the fan/fans are on. I seldom get enough cooling with only the primary fan so both of mine usually run at the same time with no problems.