Customer stated that he has installed two fuel pump assemblies within a few days and fuel pump fuse continues to blow.
Removed the fuel pump fuse and relay and replaced with fused jumper wires that have manual reset circuit breakers install. This allowed testing without having to constantly having to cycle the key for fuel pump operation.
Circuit breaker would trip instantly. Time to start isolating. First raise vehicle and disconnect fuel pump harness at floor pass thru connector located behind driver’s seat.
Short still present. Located and disconnected harness junction block at right front kick panel.
Short was now gone. Short has to be under carpet in passenger compartment. No signs of body damage and it did not appear that the seats had been out. So where to start? I decided to look at the connector that passes thru the floor behind the driver’s seat. Lifted the carpet and saw a metal shield over the connector and some gummed up wiring.
Knew that I was close so I drilled out the rivets that were holding the plate down. Lifted the plate and there was the short.
Removed pass thru connector, removed and replaced burnt terminals and wiring. Cleaned remaining terminals and installed dielectric grease as there was also signs of water intrusion. Reassembled connector to floor board with bolts and nuts and reassembled vehicle. Actual repair time took about five hours from start to finish. It can be done in less than two with this info.