I just started having the abs and the brake light come on. It ususally happens after a few stops are made. I am already planning a tear down and inspect but what should I be looking for? dirty sensors? Its a 4wd with abs on the rear and the big wheel cylinders.

 

Does your speedometer work? Or does it only work going above a certain speed?
I am guessing it is your "Rear Speed Sensor". Dealer is best place to get them. They cost like 45 dollars.

 

First and foremost, check that the res. is full of brake fluid. There is a fluid level sensor that will turn on that abs dummy light when fluid is low. Fixed my light anyway.

 

If your speedometer is working, I'd lean away from the speed sensor. Since you say it comes on after a couple stops, watch your speed when it comes on. Mine likes to come on occasionally (sometimes repeatedly, then will leave me alone for a couple months) after 60 km/h (40 mph). According to Haynes this has to do with the switch on the brake pedal. I've checked mine out, and it seems ok, so I'm not sure what the problem is. A DRBIII might be needed to check the PCM to get the right codes. My Smarty only reads engine codes, so I don't know what is actually wrong.

 

i just started getting this light too.i pulled the relay and fuse for the trailer brake today and it seems to be gone.

 

^^^^i take my previous statment back,they came back on today

 

Same happen on mine. I can drive all day around town and it'll never come. But as soon as I get on the freeway, up over 55-60 mph, it comes on.

 

My 96' did that one time. Replaced the vacuum line to the cruise control. And it fixed the problem and the cruise control. May not be the same set up on your 00'. Good luck.

 

My cruise vacuum line was broken. I did replace it, so it works flawlessly. But the brake and abs light still come on.