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Re: No voltage from PCM fuel relay trigger
I think is issue is one of two places. Either an ECM issue, or a wiring issue.
It sounds like you have the wiring figured out. Should have 12 v fused power to relay, good ground, wire to fuel pump, and the ECM signal.
On the ECM side, there could be something that is preventing it from powering up the fuel pump. Like a fault code. Might want to try checking codes, then resetting the computer by disconnecting the battery.
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1972 GMC Jimmy Custom 4.8L (L20)/6L90E/NP205
1989 Chevy Suburban V2500 350/Turbo 400/4.11 gears
1996 Chevy Suburban K1500 350/4L60E
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