Quote:
Originally Posted by norcalcap
Made a relay box for the fans and headlights. Been working well, give it a try if you like....
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Have you not had the check engine light come on? I have the same diagram for the fans and trinary switch, but with a diode and a resistor on the blue wire out of the trinary switch so the PCM doesn't see an uncommanded ground and turn on the check engine light.