UPDATE: ABS and Brake light -- NOT THE REAR SPEED SENSOR
So, for a while now, I have been having issues with the ABS and Brake light coming on from time to time. I always just lived with it. I have never had problems with the spedo, untill yesterday when it started going up in increments. So, I decided to finally change the rear speed sensor in the diff. The brake light and ABS are still coming on. Here are the details... It does comes on faster in hot weather, and sometimes does not come on untill I hit a bump in the road. Other times, it comes on as soon as I start the truck up. Now, during the winter, sometimes I could drive 5 miles to work and it would not come on at all. I do know that even when the ABS light is on, the ABS still engages (found out the hard way... on ice.) Now, the WIERD part. I was hauling about 1800 lbs of paving stones for my brother and during a hot day and on a 20 mile trip, the light NEVER came on. But as soon as I emptied my truck and was heading home, it came right on. So, I believe there is a short or something somewhere, but cannot figure out where to start.
Does anyone know where the wires (from the rear speed sensor) go to. Such as, the ECU, the ABS module, etc... and what color the wires are there?
I have already replaced the front two wheel hubs and ABS sensors, the back ABS sensor (in the diff) and I have also replaced the transmission (last year) along with all sensors on it. All with no change. I dont think it has anything to do with it, but I also replaced the computer last year (due to a different problem). I have checked and cleaned the connections at ABS module under the hood also.
I am stumped and I would rather fix it myself then pay the stealer ship $500+ to say they can't find the problem, or $1000 to replace a $50 part.
The truck is a 1999 Ram 1500 4x4 with 4 wheel ABS and it is an 5.9L auto. Everything in both the front and rear axles is stock and I have the same size tires all around.
win or lose, knowing you gave it your best you finish a champion......
1999 Dodge Ram 4x4 Sport 5.9L 360 QC
Last edited by Intense-Dakota; 08-16-2011 at 12:22 PM.