pupeperson

My buddy's 1999 24v truck has an electrical problem. While driving down the freeway on cruise control, all of a sudden the cruise disengaged, the ABS light came on, the Parking Brake light came on, and the Speedometer became inoperative. All of this happened simultaneously. Anyone know which relay or fusible link or what other part may have failed? Truck still runs and drives fine, but has all of the above malfunctions. We appreciate your help.

crobtex

It's probably the speed sensor on the top of the rear axle. About $35 from a Dodge dealer.

pupeperson

Thanks Crobtex, I'll pass it along.

chuntabear

Nope it wont be the speed sensor in the rear,it just gives you the ABS light and brake light your speed-o will still work. I am dealing with something like that right now. It is the ABS system ! I took mine in to get the speed-o checked and the put the truck on the roller and run it up and the speed-o would not work, the rear sensor does not run the speed-o by its self. If you unplug the front plug on the ABS pump(under the hood) the speed-o quits working and the brake light will go out too but the ABS light will stay on. I would take a good look at that plug first, and check the front sensor's. I think that is where the speed-o gets its input from. See my post below, I have been fighting mine for a week now and still havent got the answer.

crobtex

On mine the speedo didn't work, and if you'll do a search, you'll find that is often the case. This may not be your problem, or his , but it's been the problem in many cases.

pupeperson

My friend picked up a new speed sensor and is attempting to install same. Took off the retaining bolt and the sensor is still stuck in place. Is it threaded or does it just have a stuck O-ring or what? He says it's made of some kind of hard plastic and he doesn't want to just start reefing on it for fear of braking it off in the housing. Any ideas? Thanks. I'll keep you posted.....

pupeperson

Thanks guys! My buddy got the sensor out, replaced it and now everything is working again. He sez thanks alot!