2004 ford ranger no fuel pump power

[Nateranger]

Please make 100% sure you know what you are doing. Do not fry your computer

I’m not 100% but I have my stepdad working with me on it and he’s very familiar.

 

[Pastrysqueezer]

I’m not 100% but I have my stepdad working with me on it and he’s very familiar.

Don't be intimidated, your relay should have a diagram on the side. I just use a paperclip. Here is an example. From Google

 

[R.C. Champagne]

Just wanted to make sure you checked the underhood fuse box, not the one inside the cab. In the underhood fuse box it's fuse 23, 20 amp.

Do you have power on the darkgreen/yellow at the inertia switch when the key is first turned? Of course the engine is not running, so you will have to keep turning the key on and off to check for power, it will only be there for a couple of seconds if the engine doesn't run.

Correct and accurate about the power measurement at that point. https://www.therangerstation.com/forums/threads/2004-ranger-fuel-pump-inertia-switch-fpis.216147/
Just to be clear.

 

[franklin2]

Correct and accurate about the power measurement at that point. https://www.therangerstation.com/forums/threads/2004-ranger-fuel-pump-inertia-switch-fpis.216147/
Just to be clear.

If you turn the key on and off, on and off, do you build fuel pressure in the fuel rail?

 

[R.C. Champagne]

If you turn the key on and off, on and off, do you build fuel pressure in the fuel rail?

Not in my case. Apparently, the wires to the Fuel Pump Inertia Switch (FPIS) would lose contact but would reconnect after a period of cooling or the monitoring that the Powertrain Control Module (PCM) does of that circuit was disabling the fuel pump relay. Here is a link to what my problem was. https://www.therangerstation.com/fo...-pump-inertia-switch-fpis.216147/post-2129897