Any one have an internal electrical schematics of the VP44
To SEmerson,the first is to test the electrical controls from the ECM,I don't have an internal schematics of the VP44 so I can't help you with the actuall VP44 internal stuff. The first test is to make sure the VP44 is getting powered up,the fuel pump relay powers up the VP44 at pin #7 of the VP44,( red and lightgreen)or pin 87 at the fuel pump relay,fuse #3 in the power distribution box under the hood feeds batt. voltage to the relay (red & white)pin #30 ,ECM powers up pin 86 at the fuel pump relay (brown& white)to energize relay. Pin 85 is a black wire which is relay ground. Can anyone please post the internal wiring diagram of the VP44 and what each of the 8 wires, do so we may learn to do our own checks.