FLD120 no start, no cab gauges

I called myself checking the plug portion itself too, but I'm gonna go back to it in the morning and see what I find. Thanks for the tip!

 

manual fuel pump run on side of air compressor. and yes, it will hit on ether

 

@GrapeApe should 87 be hot with key on or off?

 

Okay, I am about to pull my hair out. Had a tech come out and hook up computer. I'm getting pulse from injectors and SRS signal. Somehow he got it to crank. I personally think it was ghost settings from the computer that the ECM was reading. The original ECM showed faulty memory. Hung a new ECM on it and it cranked. Mounted that new ECM, the tech left, no crank.

@GrapeApe , I went to that relay beside the ignition that is marked VCH SHUTOFF. The ignition relay feeds from it. 30 is hot, 87a is hot. 87 never got hot with or without key. Trying to trace wire D499 to see where it goes b/c that is a ground that isn't grounding on that relay. Because of this, the wire that feeds a whole bar of circuit breakers isn't getting fire at all. I have yet to back track D499 because it goes thru that wasp nest of wires under the dash and I keep losing it. If anyone has a diagram that know what it's for and where it goes, I would appreciate it. Somehow, whatever is doing this is not sending signal to my ECM and telling it "let's go".