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I just changed Fuel Pump in my 99 F150 and will not come on , What do I check ?

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Find the inertia switch on he passenger side. It should have a dark green with yellow wire. Check for power on that wire when you turn the key on or try to start. If there is power make sure there is power on the pink with black wire. If there is power on the pink/black wire than you will need to drop the tank to access the connector and see if there is power there. I have run into after market fuel pumps that where not plugged in at the pump. Only made that mistake once. Now I check every one before they go in the tank.

Posted on Nov 28, 2012

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Posted on Jan 02, 2017

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SOURCE: fuel pump fuse keeps blowing and truck wont start

yes u should change the fuel pump

Posted on Dec 01, 2008

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SOURCE: changing fuel pump 99 slverado

there are 2 ways to do this. you can drop the tank or take the bed off. i prefer to take the bed off it was easy er that way for me. but once you get to the top of the tank there will be a ring that holds the pump in just take a pair of pliers and take it off but you will need a special tool to take the fuel lines off because they are quick connect lines but once you get it unhooked it should just slide out the top.

Posted on Jul 06, 2009

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SOURCE: '88 f150 will not start, 0 fuel pressure

I know the ford cars had a trip relay for the fuel pump. In the event of a wreck it shuts the fuel pump down and has to be reset manually. I am unsure if the pickups had the same thing.

Posted on Jul 11, 2009

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SOURCE: 99 dodge fuel pump intrepid how to change it

Start by safely raising the rear end of the vehicle well above the ground. Note: it is best to change the fuel pump with as little fuel in the tank as possible. Once under the car locate the fuel tank and remove the large filler tube going into the side of the tank. Also, if equipped, remove the smaller tube next to the filler tube. Then, remove the two bolts furthest to the rear of the vehicle that are retaining the fuel tank hanger brakets. This should allow the tank to sag down in the rear end, allowing you access to the fuel pump wiring harness, vent tube, pressure line, and return line. Remove all of these carefully. Note beware of residule fuel pressure in the lines, also the fuel lines may require special disconnect tools to unfasten them from the pump assy. With all lines, tubes, and wiring removed from the tank, remove the brackets from the tank and manuver the tank to the ground. Move it to a well ventailated spot and then use a flat tip screw driver and a hammer to work the fuel pump assy. retainer nut couter clockwise off of the tank. Remove the pump assy. from the tank carefully and replace. Reverse procedure to reinstall. When attempting to start the vehicle the first time after service cycle the ignition key back and forth from the locked to the on position at least three times in order to prime the fuel system, as there is no fuel pressure in the lines following there removal. Also be sure to check closely for leaks once the vehicle is running. Then watch closely when adding fuel for the first time following service to ensure a proper seal at the filler tube.

Posted on Oct 24, 2009

  • 984 Answers

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 :

Posted on Jan 03, 2010

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