Fuel Pump Wiring Experts, I need help Options

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My fuel pump is in the front.

It is fed by the original wiring at the rear suspension point

If I power the fuel pump from an auxiliary 12 volt source fed from the rear, the pump runs. That eliminates the wiring from rear to front, and the pump.

If I put a meter on the pump wiring at suspension point I get a reading of hundreds of volts. How do I get Hundreds of volts from a 12 volt circuit. I am guessing a short would cause amps, not volts.

I have been changing relays, and the board. I did what Dave Darling mentions and checked out the #30 at both board relays. I had constant 12 V there I changed the fuses.

Car was run hard in the rain for a couple of days. I suspect water got into something but where? Relay board was covered. Everything else seems ok. Maybe it is not water. What do you guys think? It has to be somewhere between the board and the wiring at suspension point. Is there another connector between the suspension point and the board? Lots of questions..... Sorry.



Thanks