After replacing my FPR and nut kit, etc.. a couple weeks ago, my ABS light would come on with start up and stay for about 5-10 minutes then shut off and I could feel the ABS reactivate and the light goes off, last night after turning the truck on the "Anti-Lock" light stays on now and won't shut off. I paper-clipped the OBD1 A to H to check my codes and I am getting many different codes. I have 25, 66, 21.. and a couple more. I lost a little brake power for a split second the other day but that was the only time it has physically malfunctioned. Any ideas on what is causing the light to stay on?

 

Code 21 - Right front wheel speed sensor or circuit open
Code 25 - Left front wheel speed sensor or circuit open
Code 65 or 66 - Open or shorted pump motor relay
So what are the other codes? Need all the info if you want help fixing it.

 

ok so I double checked and these three codes are all I'm getting, they just flash three times a piece lol. Do ya think this sounds like an electrical connection issue?

 

Sounds like you have some sensor issues in the front sensors. You can try cleaning them. That sometimes helps. You mightt also check the wiring from the sensors. Sounds like your OBD is working properly.