1998 ford f150 no voltage to fuel pump
#2
Im in the same boat. Mines a 91 F150 and their is no power to the fuel pump. Im thinking its my EEC (computer) but want to replace the relay 1st.
#5
I just had same problem with my 87 f250. If the relay does not fix it start check wires for proper voltage before you replace the eec. I had a corroded wire in my wire harness that was only allowing 3 volts to get thru instead of the 12 volts that it should of had. It took me about 3 hours of traceing wires, testing with meter and unwrapping electrical tape from the harness but i found it. Cut out the bad spot and soldered in new wire and now i have power to the pump again. Always test before buying electical parts, since they can'nt always be returned if it did not fix the problem.
#6
I just had same problem with my 87 f250. If the relay does not fix it start check wires for proper voltage before you replace the eec. I had a corroded wire in my wire harness that was only allowing 3 volts to get thru instead of the 12 volts that it should of had. It took me about 3 hours of traceing wires, testing with meter and unwrapping electrical tape from the harness but i found it. Cut out the bad spot and soldered in new wire and now i have power to the pump again. Always test before buying electical parts, since they can'nt always be returned if it did not fix the problem.
#7
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#10
He might want to check all the fuse in the engine compartment fuse/relay box.
#12
#13
Yes, it is. If you truck is stock.
Look at the firewall side. You'll see the connector. The EEC is on the other side of the firewall. You'll also see a bracket that holds it in. There is one bolt at the top, remove that bolt and slide it into the inner fender well. our gonna have to be creative, you can remove the computer with-out removing the inner fender well. My brother did and he's not too bright so, I am sure you can do it.
Look at the firewall side. You'll see the connector. The EEC is on the other side of the firewall. You'll also see a bracket that holds it in. There is one bolt at the top, remove that bolt and slide it into the inner fender well. our gonna have to be creative, you can remove the computer with-out removing the inner fender well. My brother did and he's not too bright so, I am sure you can do it.
#14
Jeez...no wonder I am confused. You are one of 3 posters in this thread with the same questions, and 3 different trucks. Go post your own thread and quit crapping in this one. When you do this is really screws stuff up.
#15
The fuel pumps on my '88 did the same. Both fuel pump wires had corroded out of the EEC connector or whatever it was. The EEC thing above the wheel well. I'd check every connector you can think of and find in wiring diagrams before you go replacing things. You'll spend more money than need to and be one pissy panda.