Fuel Pump Wiring Experts, I need help Options

[wndsnd]

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

[wndsnd]

Fixed!

I pulled the relay board and WD40'd the whole thing. I continuity tested between pin 14 and the 25 amp fuse, then to socket pins 30 on power and fuel pump relays. All well.

I went to front and pulled two known good headlight realys and replaced both relays.

Replaced battery in Meter for good measure.

Powered everything up and went down to suspension console. Found 12V!

Turned off ignition and went back to console, connected fuel pump wires and went back to ignition. Turned on and the fuel pump kicked on.


Thinking water saturated board and with the WD 40 and cleaning it got sorted out.

BTW Replacement board had no continuity between pin 14 and 25 amp fuse socket or power relay socket#30 and fuel pump relay socket #30.

Now on to other productive stuff.

Thanks again World.