Taubr Unit

iTrader: (32)

So I already screwed myself by wiring my fans NOT knowing they are ground switched from the PCM so I had to rewire that. Now the green wire that comes from the pcm to trigger the fuel pump, is that ground switched also or is that a 12v source that I can use to turn on/off my fuel pump relay on my Leash board?

Alvin@PCMofNC

Don't know what type of car or year but traditionally GM has used a hot trigger from the PCM to the fuel pump relay.

Taubr Unit

iTrader: (32)

It's a 6.0 lq4 swap in my 94z. Using a 99+ PCM with a PSI harness that is wired to factory spec.

oange ss

iTrader: (50)

12v+ for fp relay

Bowtie316

iTrader: (1)

86 terminal on relay should go to ground, 85 should be positive signal from PCM (C2-9).