I need to find where the fuel pump relay is located in my 2001 F350 5.4L gas , suspect it's faulty,

 

Should say in the owners manual. In my 01 f-150 it was on the passenger side kind of to the right of the glove box and below it some. Same as the 90s f series also. Don't know if that's right but just an idea. It's just a button on the little box you push on to reset. I use to have to do that every once in a while.

 

No, that's not the FP relay, that's the inertia switch.


On an 01 SD, the FP relay is under the dash, up near the center.

 

Should be under the hood,in a covered box with relays and fuses,left side near the master cylinder.

 

Factory service manual sez it's under the dash. Don't feel like going out in the rain and looking at mine.

 

under the dash, to the left of the radio. there are 2 relays there, but i dont remember what the other one is for.

 

Remove your radio and it is in the left inside a black box about 1'x 2' big....and its the top small one

 

My 2002 5.4 gas had no relay. The back of the fuse box is a circuit board that acts as a relay. I went to every location mentioned in search of a relay until a Ford repairman advised me of the circuit board.

I replaced it with a fuse box from a junkyard and fixed the problem.

 

The 02 is different from the 01 that is being discussed in this thread. You have to take the model year, among other things, into consideration.

Next time someone asks about the 02, then chime in. In the meantime, try not to confuse the issue with information that doesn't apply to the vehicle under discussion.

 

Relax guy, I don't know what years where different. (and the poster may not either) Trying to help. The Ford microfiche for my truck said it was behind the dash as well but that was incorrect.

 

Now you do.

Not trying to bust your chops, I'm just trying to prevent wild goose chases caused by well-meant but wrong information based on a lack of knowledge.

 

I know a couple of things now.

 

the info has been great, I have a 2001 F350 SD 5.4L some times it's starts some times it doesn't. I can hear the fuel pump when you turn the key on when it starts and now I can't hear it when you turn the key on and of corse it doesn't start. I found the relay under the dash replaced it. Still doesn't start or cant hear fuel pump when you turn the key on. I hooked up 12 volts directly to the fuel pump connector next to tank, and can hear fuel pump working just fine. So I checked the voltage at the connector near fuel tank that comes from the front of the truck and it is only registering 6.665 volts. When i turn the key to start truck and check the voltage at the connector it rises to 10.7 to 11.6 volts and then goes back to 6.665 volts when you stop cranking and leave key on. Any suggestions?

 

your info helped

 

When you first turn on the key, the pump runs to prime the system, then it is supposed to switch off until it the truck starts. From memory, I believe your voltage swing is correct.

I don't want to get into a pissing match with other guy, he may be able to help you more than I can.

My truck is an 02, but with a Sept. of 01 build date. I don't know when they changed relay locations. Here is what I did on my truck; my problem was sporadic so when it was in a mode where it did start I started the truck and left it running. Then I pulled the relays behind the dash, and another one or two that I read about supposedly in the engine compartment and my truck kept running. That is where I got into the real head scratching until a guy helped me out about checking the fuse box. I don't know if this is your situation or not. The fuse box isn't that hard to pull out. Couple of screws and several connectors which are dumb proof to plug back in correctly. Inside the back side of the fuse box, mine had a circuit board which was the fuel "relay".