No power to fuel pump

Welcome to 2CarPros.

Check the fuse which powers the switch and relay. I attached a picture of it. If the fuse is good, check to see if there is power to it.

Next, you will have to check at the PCM pin 8. I attached a picture of that also.

Let me know what you find.

Joe

Okay, power to and out of the fuse and power to the green wire(with yellow tracer on pin 8).

But still no power to the inertia switch.

Welcome back:

Then either there is a break in the wire itself or the splice has lost its connection due to corrosion, vibration, age, and so on. I circled the splice in the attached picture. You will need to trace that wire from the inertia switch back until you locate that splice. I suspect that is where the problem will be.

Let me know.

Joe

I’m dumb. There actually was power to everything. I thought leaving the key on would show power but there is only power for a couple seconds after the key is turned on (to pressurize the fuel system). There was power to the pump. I changed the pump and still it wouldn’t work. It turns out it was the fuel pump hanger causing the trouble. The four wires enter the top of the hanger assembly and must be corroded because I tapped on them with a hammer while someone turns the key and the pump ran and the truck started. So I will change the hanger assembly. Thanks for your help!

Welcome back:

Dumb? By no means. I know techs that wouldn't have figured it out, so my hat is off to you. Let us know if we can help.

Take care,
Joe