Car Questions
RepairPal is your advocate for car care advice and guidance

No power to fuel pump

(1990 Ford F-150)
in Burns Flat, OK on July 05, 2010
just to day truck would not start fuel pump not getting power
Displaying 4 answers & 0 comments
Popular Answer
on July 11, 2010
First check the fuse( i think it may be under the hood) then the relay. If these check out, there is an impact switch that cuts off the fuel pump in a roll over or high impact. It is in different locations,... frame, under floor mat, Etc.
Sign in to reply
on September 17, 2010
The inertia switch (incase you roll over) is under the dash and can go bad. You should be able to jump it out to see if that is the problem. I had close to the same problem my computer stopped sending a ground signal to the pump relay.
Sign in to reply
on August 19, 2016
So, if the inertia switch has no voltage, will the fuel tank selector switch have no voltage also? I have the ability too put a jumper wire @ fuel pump relay, under hood, from yellow to green, and, it kicks the pump inside the tank on. I have not got voltage at inertia switch, or either fuel pump while cranking. This is a 1994 F-150 4.9L 4x4 duel tank, both tanks have pumps inside. My relay is on drivers side in a big box with the fuse's. I did checks at the relay like this with my voltage meter; low current test from green to ground (yes power with key on); High current test from yellow (yes always
Sign in to reply
on October 09, 2010
fuel selector switch if duel tanks
Sign in to reply
Get a repair estimate
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide.
Or interested in getting a repair? Find a Shop

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
Two months ago my car broke down, engine stalled at could not start. eventually, after changing the in-tank fuel pump...
Ignition on no power to fuel pump fuse crank engine and fuse lights up an car starts and wont rev up or drive
Didn't find what you were looking for?