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Old 04-11-2018, 08:50 PM   #3
GM man
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Join Date: Aug 2011
Location: Gainesville, Texas
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Re: Fans and AC don't wanna mix

Quote:
Originally Posted by VetteVet View Post
Are you running the PCM control to 85 or 86 of the relays? if it's 86 and the relays are diode protected you may be getting the 12 volts from the relays through the diodes.

Just a thought.
Well.. The PCM is on 86. I reversed 85 & 86 and had the same result. Tried a couple of other relays and the same thing. I'm getting 12v on that leg which doesn't make sense to me, but I hooked it up and it's working now. Before I soldiered it together, I was just touching the wires together to ground it and it sparked and killed the engine, which really confused me, but it seems to be working like it should now 🤯
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