Quote:
Originally Posted by First c10
After much research the genIV stuff has to have ac request via canbus. No other way for the PCM to know the ac is on.
I found a modular for 300$ for ac request for gen4s. NOT.
Dakota digital should offer a BIM for it. I am going to call and ask about it.
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I don't think the gen III is smart enough to recognize anything more than +12V or ground. That article I posted the link to has me wondering if I should try switching positive 12V to the pcm for the AC request signal instead of the switched ground I tried that the pcm didn't see (through a Tech 2). I'm just nervous about sending 12V that it doesn't want to see and hurting the pcm. The schematic I am using as a reference shows ground but its a 3rd party schematic and not from GM. I can't seem to get a definitive answer anywhere.