What do i have to do to straight wire fuel pump


Asked by Dec 05, 2015 at 04:34 PM about the 1987 Ford F-150 STD Standard Cab 4WD SB

Question type: Maintenance & Repair

Replaced fuel pump in tank also fuel pump
relay switch and still have problems. It will
run sometimes and won't the next time

4 Answers


Have you checked the inertia switch? Fords are known to burn the contacts right at the switch, might be worth a look.


See pic.


Thanks for that but already jumped over that when I got the truck


To wire the fuel pump directly you will need to install a wire from the fuse box to the pump. Use a circuit that is only energized when the ignition switch is on. I would be cleaning and checking all the connections as an intermittent problem is almost certainly a bad connection somewhere. The inertia switch is a safety device so I would not eliminate it.

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