I own a 1987 Chevy C10 Pickup with a Holley Throttle Body, 2WD, Fuel injection. The fuel pump stopped working on me and truck died. Replaced pump, and it is still not starting. Checked volts going back to fuel pump and it's showing it's only getting 6 volts, instead of 12 volts. Not sure what the problem is??! Can anyone give me advice or refer me to a wiring diagram so that I can check to see if it is the wiring or a bad relay or what?! Any advice would be greatly appreciated, im desperate!!