I have a 1990 Ford F150. The fuel pump runs when hard wired to battery, so is not getting fire to the pump?

If you do not have power to the relay, but you do have power to the fuse. Check to see if it has a rollover/cutoff switch. It should be listed in the owners manual with the location.(usually inside passenger kick panel).

If you need a wiring diagram just follow the wiring diagrams link above and follow the instructions.

No power to fuel pump Troubleshooting:

  1. Check power at the fuel pump fuse
  2. Check to make sure the roll over switch hasn't activated
  3. Check the fuel pump relay
  4. Trace wiring and look for an open or short

No power getting to fuel pump