I am trying to figure out this problem. My ABS and Brakes lights are on. I've replaced the the rear wheel speed sensor to no avail. Took it to dealership and they couldn't read the codes. I got to tinkering with the fuses and noticed on fuse 14 RWAL/ABS, only 1 wire is going to it. What else should be on that fuse?

 

2 or 4 wheel ABS?

 

4 wheel.

 

If you don't have one already, grab the service manual for your truck from here. Wiring diagrams are in section 8W. Take a look at the ABS section there, and see where things are supposed to be.

 

Not at home right now, but...

Turn on the ignition and test the voltage at that one wire, without the fuse in. I bet you get zero as this is probably the down stream (fused side ) of the circuit. The supply side is probably inside the fuse block itself. As part of a bus strip that supplies voltage to that fuse and others.


And if you check the other side, with the fuse out, you should get 12v (with ignition on)

Let us know.

 

That's exactly how it played out. I was hoping that may have been my issue...

 

If you have 4 wheel ABS, you will also need to look at the speed sensors on each of the front wheels too. Also, on my FJ, I had a broken wire from the sensor, not the sensor itself.