1990 ford ranger 4.0 auto

fuel pump not working, I suspect a ground short

I’m providing a video on YouTube that fixes a crank no start problem.

I did all the test and found out, that on the fuel pump relay the wires on the load side that are supposed to have control are staying hot

https://youtu.be/NNC1PGAsmM8?si=jEmvQbvKMPP93r3V

 

A short is normally a hot wire (positive) that contact ground and blows a fuse or burns the wire. In many automotive applications, ground is switched (on and off) to complete a circuit which activate/deactivate an electrical component. I don't know if the fuel pump is like that, but you might check the ground wire to make sure it actually has good ground contact. If not trace the wire to find out why it is not getting to ground.

 

Okay I found out that all fuses on the fuse box located in the passenger side fender are all good. Could that mean it’s a wire in between the wiring harness ??