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I have built my harness form schematics found on the internet and all fans a functioning perfectly when relay wires are grounded.
My question is, what pin and on which connector do I need to add a wire to for the pcm will trigger my relay?
The Harness and PCM are from a 2003 5.3l silverado :ma:
blue #42 will ground once it is programmed into the PCM. I guess the pcm also needs a "turn-on" temp to ground this pin... Anyone correct me??
Depends on which harness ?
Pins 33 and 42 .
The harness is from a 2003 silverado, but what would that matter I will have to add the pin to the pcm correct?Quote:
Originally Posted by use2bfo