Engine/Transmission (1998.5 - 2002) Brake and ABS idiot lights are on

[Devildog]

last week the lights would come and go, but now there on all the time. Everything seems to be OK, brakes fine, no pulling, rears seem to be fine, have a full pedal. has anyone come across this problem before?

 

[Kyle]

Abbott installed?

I see you have over-sized tires. Do you have an Abbott Electronic Ration Adapter installed too? If so, that thing can cause the ABS & Brake lights to come on if connections are shorting, box is going bad, etc.



If you have one, try bypassing it and see if the lights come on again.

 

[Daddy]

Is your speedo acting funny? When my brake warning and ABS lights were on my speedo would read above 25mph then below that fall to 0. It was my speed sensor, it is located on top of your rear diff. I think it was about 25 bucks

 

[Gizmo 007]

Been spinning your wheels? I know when I do burnouts, my abs and brake lights come on, but usually go out after an hour or so of driving. I'll also agree with D, one of the wheel sensors could be going on you.

 

[andrewkoperdak]

I had the same indications that you say you have. My sensor on the rear axle ( abs sensor) went bad. Was replaced with less than 10K miles on the truck. No problems since

Andy

 

[Reb.B]

its the speed sencor on top of the rear end

 

[Devildog]

Thanks, you guys maybe right. The rear differential is covered in oil from a B-1 failure, I'll clean the connection with a degreaser and let you know.