Well it's been a while and I've made some good progress and have come up with some questions.
I've been looking into the bcm route and looks somewhat straight forward as long as you have the pinouts. Is there any benefit to connecting the serial data and class 2 data between the pcm and bcm or can you? Also how do you get the warning chimes if there is no conection from bcm to stereo leads. None that I see anyway.
Also I'm confused. Everything that I have read says that a 2002 truck motor dose not have electric fans and is dbc. My truck motor did not dave a mechanical fan and is dbw. Current performance did the harness and pcm. They left me an a/c request and wired in the e fans and the A/C clutch it wired into the main engine harness.
I'm getting ready to order an a/c system this weekend and I've read a lot about weather or not to use pcm to control fans and clutch or not. But none of the threads so far are close to my situation I think. So sorry if I'm beatting a dead horse with my questions.
If I went with trinary switch how do I control fans if they are already controlled by the pcm. How would I incorporate the trinary? By putting it in line
, supply- trinary - a/c request lead.
Can the oil pressure lead from the pcm be used for an oil pressure gauge? It was one of the leads Current perf left in for me.