Archived Bbrake Light and ABS Light

[Ed2]

Hi,

My brake and abs light come on while I a driving, it might come on after twenty or more miles of driving or it might come on soon after I start.



The dealer says that is the brake modual and that it will cost $600. 00

to replace. I just don't buy what tha dealer is saying



Any help on this would be appreciated.

Thank You, Eddie

 

[MMeier]

Eddie, what year is your truck?? Put up a sig!! My ol' 97 had this problem and it turned out to be the speed sensor in the rear diff, and the harness it connected to. Dodge had a TSB out on this a while back, don't know if it's still valid or not. There have been other threads here on this very subject.

 

[Gene Arnold]

Ditto to MMeir.



My '96 had the problem and the sensor took care of it. I fixed it myself. However, I did't like getting gouged by the dealer for $73 for the part.



Gene

 

[DanSullivan]

My 96 will do this every so often its the vacuum line some place, on mine you can step on the gas and the lights go out. I keep meaning to look or replace the conections.

 

[MMeier]

My 96 will do this every so often its the vacuum line some place, on mine you can step on the gas and the lights go out. I keep meaning to look or replace the conections.

 

[DieselLady]

My truck just had a problem with the speedo only working above 20mph. Then the abs and brake light came on and would not go out. The VSS, vehicle speed sensor is located on the top of the rear differential and was $40. 00 at the dealer to replace. popped it in and all is well . For all electronically controlled trucks the VSS is giving the computer info for a lot of different functions. Strange things happen when it starts to fail. My truck has 84000 miles on it.

 

[RTolbert]

Ditto on the speed sensor in the differential in my 99. Replaced it last spring and all is well.

 

[y-knot]

Your killing me here, You need to include the year and type of truck if you expect to receive help on future issues. Since you are debating the cost, I will assume it's not new or newer, because they would have warranty. So that means you have a Kelsey-Hayes 4-wheel anti-lock braking system like most others. If it's 94-96 then you have the vacuum operated booster, otherwise you will have an hydraulic brake booster, 97-on.

Check the obvious things, vacuum connections, and vacuum readings. Many times if the ABS warning light comes on and stays on, it's the RWAL system at fault. Make sure the brakes, calipers and wheel senders are in good condition. Check the electrical connections at the control module assembly, check the fuses, follow the wiring harness back to the speed sensor and check it's connection. The brake light switch is under the dash at the top of the pedal, it can be removed by twisting it 30 degrees and pulling out. A manual will tell you how to test it. You also have a combination valve at the master cylinder, which could give a trouble code and resulting warning light. The trouble codes can be down loaded to the warning light on the dash by grounding the #13 terminal on the RWAL Service Diagnostic Connector, which is located to the right of the 16-way data connector under the dash. There are 15 fault codes (1-15), that can occur, by grounding the RWAL terminal (#13), you will get a long flash and a series of short flashes, count the short flashes and then compare that number to the fault code chart found in most service manuals for the Dodge trucks. Not sure about your mechanical ability, you will have to find your own comfort zone, but their are a few checks most anyone can make to see what is up with their trucks braking system. Good Luck

 

[DieselLady]

Now here's someone who knows what their doing!!!