Just replaced the fuel pump in the Gf's 97 Disco. When I pulled the fuel pump I noticed the plug going to the actual pump had some melting. Put everything back together and it ran great. Started right up. Shut it down and went to start it back up and nothing.....It would crank but it was not getting pressure at the rail and I didn't hear it prime at the turn of the key. Checked to see if I was getting power to the pump. No power there. Checked the inertia switch. It was in the correct position. Checked to see if there was power to the fuse. No power to the fuse. Pulled the relay. I am getting power to there. So, should I order a new relay? Anything else I should try before ordering that?

 

"the fuse"

Multi-function relay has two fuses involved in the fuel pump system. F6 in under hood fuse box, F3 in one of the sub fuse panels under dash. See attached from RAVE ETM.

 

When checking for power to the pump, remember the ECU only powers up the pump, on a prime cycle for 3 to 4 seconds.
I would be more concerned about the burned spot on the old pump, wonder if something is cause the same problem for the new pump.

 

Well, apparently I can't set a multimeter correctly. I am getting power to both those fuses but not to the pump. I wired directly to the pump and get good flow then. Should I rule out the relay and look more into the wiring? Thanks for your help!

 

The alarm did not go off, but it has caused troubles before, do you think this could have anything to do with it? Does the immobilization work by cutting off fuel? Would it still be able to crank over?

 

The pump only has connectors, wire, the inertia switch, and the multi-function relay between it and the battery. If you don't have power coming out of the relay - then the relay is bad, or the ECU is not turning it on. The alarm immobilizes by disconnecting the starter relay. So if turning over, it may not be the alarm.

 

Thanks for all the help, the culprit was a bad wire going to the actual pump and i did not set the multimeter correct..... SMH I used an airtex wire harness part # WH3000