Fuel pump relay
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New User
Joined: Feb 2004
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Help! Fuel pump relay
I'm very inexperienced with truck repair, but after reading various posts here, I'm pretty confident that my '91 F150 just needs the fuel pump relay replaced. There's a buzzing from the fuel tank with the key in the Off position. Sometimes just flipping the dashboard switch to change from the front to the rear fuel tanks will stop it, but not always. I've located the relay (thanks to reading posts on this forum!), and found that even a light tap on the fuel pump relay stops the buzzing. Bought a replacement relay and .... can't get the old daggone relay OUT! I've wiggled and yanked on the thing (with my hand) till I'm blue in the face, but it won't budge. I'm afraid if I stick a pair of pliers on there and really yank I'm liable to bust the plastic housing and end up worse off than I already am -- after all, for now it's at least running, and my main concern is that I'll run down the battery. Is there some trick to pulling a relay that I'm not aware of? 
Thanks!
Laurie
Thanks!Laurie
Last edited by LCran; Feb 1, 2004 at 01:52 PM.
Lead Driver
Joined: Nov 2002
Posts: 9,557
Likes: 44
From: Concord, NC
There is a clip holding the relay in the piece that attaches to the air filter housing. I'm not exactly sure how yours is, but on mine, there is a clip on the inside at the very back of the holder. Pull back on the clip and down on the relay. Then it just takes some wiggling on the clip to get the relay apart from the wiring harness.
Post Fiend
Joined: Mar 2003
Posts: 14,413
Likes: 3
From: Sarnia, Ontario, CANADA!
There are a few wires that go to a plug. This plugs hooks to the actual relay. Then the relay slides into that black housing. It is held in by a plastic type clip. You might be able to take off the plastic housing and turn it upside down to see what you are doing. If you are worried about draining your battery you could unhook your negative battery cable or unplug the harness from the actual fuel pump relay. Good luck....let us know what happens.
-Matt
-Matt
