ah.b.normal
Goblin Guru
IMO: Grounds are always available as a problem, they can add resistance to a circuit and strange things follow. Trust no grounds, Test all grounds with Voltage meter, not just a light. Verify resistance free grounding.What does Low Reference (purple) do? I think I need to be chasing the pink/orange one but just making sure.
If ground or supply voltage were the issue it wouldn’t pump fuel, correct?
From the schematic, I don’t understand where the pink wire is running to. I think it’s saying to go to the PCM (ECM)?