roughridn_sob

Im not much for long stories so here are the facts

1993 F150 extd cab 4x4 5.8 (351) V8

-Truck was driving today
-fuel Cut off on the interstate and towed home
-tested all the fuses and relays (PCM and fuel pump relays) all seem to be working (clicking)
-inertia switch is not tripped
-Have power to sending unit
-No power to fuel pump (either front or rear)
-check codes getting code 542

Questions:
can the relays be bad even though they seem to be clicking?

Please include diagrams or crude paint pictures if your suggestions include chasing wires as I don't have any books or literature on this truck. Any help is greatly appricated.

roughridn_sob

UPDATE!!

I just went out there this morning and started from scratch:

selector switch front-no jumper-key on : nothing

selector switch back-no jumper-key on : hear the back pump prime

selector switch front-jumper from pin 2 to 6-key on : nothing

selector switch front-pin six grounded with test light-key on : nothing

selector switch back-jumper from pin 2 to 6-key on : good prime

selector switch back-pin 6 grounded w/ test light-key on : good prime

Tested all relays in the horn position and got a beep out of all of them

So you might be saying to yourself, sweet so just run off of the rear tank but here's the problem the rear tank seems to be feeding into and over-filling/over-pressurizing the front cause I know I had fuel in that rear tank and now its empty. and my front was about half and it is full. so now my problem is 2 fold

1. Why is the rear tank pumping into the front and how do I fix it?
2. Does it sound like my selector switch is bad since everything works in back but not front?

Just call me Sean

iTrader: (1)

Bad front pump assembly allows fuel to flow to that tank.