ABS Warning Light & Speedometer Wiggle

[Big AL]

I experienced my ABS warning light coming on. I stopped and shut the engine off. Looked under the hood, and under the truck (for fluid). All seemed good. Re-started and the light stayed on. Brakes working fine. The light eventually went off. After about 50 miles, it came on again, but just before it came on I noticed the speedometer wiggle from 65 to 50 a couple of times. Reckon what's happening here?

[SCUFFY828]

have someone pull the codes ,could be rear speed sensor

[oxman202]

Ever figure it out? I just put a new engine in and I'm having the same problem.

[Mercury]

If I had to take guesses at it.. I would say front left or front right ABS sensors, or the rear VSS.

It could also be the ABS module.

Ken

[icedevil]

in my experience, when your pads are low, your brake resivour reads at a low level, which causes the light to come on. you can inspect the life of the pads and replace if necessary. Hope this helps...

[oxman202]

Well, I found out what my problem was. The fan clutch wire harness got eatin by the fan when the wire harness holder broke. I was getting a ABS light flickering and the speedo was going to 30-100 mph while sitting still. I respliced it and now it works fine.