I am trying to replace the fuel pump relay on my 1991 f150. I have found it OK, but it is encased by a black half sheath. There is the one bolt, obvious right? Yet, it turns and turns, and I cannot find a nut to hold in the cab. I cannot remove the old relay until I remove the sheathing. Looks like there is a bigger fuse or relay underneath that one as well, both under the same sheath. Please help! I don't want to make a small problem bigger... I thankyou. Mattheau

Christophe Thompson

• 1224 Answers
• Posted on May 26, 2008

SOURCE: E.E.C fuse keeps blowing in 1991 Ford Explorer

if you replaced fuel pump i would look at backward wiring when replaced and i would start at the source of work if your vehicle was working fine before replacement then 9 out of 10 it will be your fuel pump wireing

sometimes when putting wireing back together the connectors have the missing clip and in turn you can turn the wireing in both directions now where positive is touching the ground on both sides of connector kris kross problem check your work this is crucial use a test light to find the right wires where they go

alex metro

• 364 Answers
• Posted on Oct 22, 2008

SOURCE: 1996 windstar relay

The fuel pump power on the Windstar is controlled by a component called a Constant Control Relay Module (CCRM).
Its located located on the driver's side of the engine compartment.

Dar

• 2007 Answers
• Posted on May 20, 2009

SOURCE: I don't here the fuel pump ever kick on in my 1990 Ford F150, and I tested all of the fuses and they are good. I was thinking the relay for the fuel pump might be bad -- any suggestions?

It's under your hood, in one of those boxes, and should be marked. Your pump won't cut in if it's fried either. Check to see if there is power at the pump. Maybe you just have a loose wire. You can always hope!

SOURCE: 1994 ranger fuel problem

I have a 1994ford ranger 4.0 xlt. I try to start it, it cranks up and cuts back off. then won't start back up. just truns over and over. sounds like its not getting fuel. changed the fuel filter, same problem. what next?

SOURCE: 1997 Ford F150 Electric Fuel Pump will npt pump

Did you check the fuel inertia switch in the passenger side kick panel ?

The fuel pump is powered :
the fuse to the fuel pump relay.
The fuel pump relay to the fuel inertia switch
The fuel inertia switch to the fuel pump itself.

At the fuel inertia switch in the kick panel, power from the relay is the Dark Green w/ Yellow stripe wire and the pink w/ black stripe wire is the power. from the fuel inertia switch to the fuel pump.

If you jumper the fuel pump relay, you should hear it run. If not pull the fuel pump relay, and check the pins in the relay socket, pin 30 should be the power from the fuse.



If you have power at pin #30, jumper the relay socket as shown with the red line above, and check the dark green w/ yellow stripe wire at the fuel inertia switch for power.
Press the button on the top of the fuel inertia switch, and check for power leaving the fuel inertia switch on the pink w/ black stripe wire.

This is tests good, check for power at the fuel pump, same pink w/ black stripe wire.
Fuel inertia switch info is in the owners manual, If you did not get an owners manual with your truck ( purchased used ), you can download one from Ford :
https://www.fleet.ford.com/maintenance/owners_manuals/default.asp