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Brake and ABS Light help!!!!
#91
10-24-2010, 09:21 PM
THE ULTI-MOD
#92
10-24-2010, 09:57 PM
Hall Of Fame
When I talked to my transmission builder (and he is freaking GREAT at it) he stated there was ABS interfaced with the sensors to the front (some how) in the trans or transfer. It would make perfect sense however I have not confirmed that.
However, how would it know to engage if the rear wheels were locked and that was the only sensor?
There would HAVE to be SOMETHING for the front that tells the ABS module to engage because the rear was locked and there was a differentiated load.
To tell you the truth, I have no idea how it works because it just makes no sense that RAWL brakes could engage EVER unless it had a counter read from some place else or some thing.
However, how would it know to engage if the rear wheels were locked and that was the only sensor?
There would HAVE to be SOMETHING for the front that tells the ABS module to engage because the rear was locked and there was a differentiated load.
To tell you the truth, I have no idea how it works because it just makes no sense that RAWL brakes could engage EVER unless it had a counter read from some place else or some thing.
Last edited by hydrashocker; 10-24-2010 at 10:00 PM.
#93
10-24-2010, 10:00 PM
THE ULTI-MOD
i would think (i could be mistaken here) that it would compare the reading from the output speed sensor on the transmission (measure if the output shaft is turning) to the reading from the rear wheel speed sensor, and if that is not moving then it engages the abs, im just speculating here but it makes some sense to me that way
#94
10-25-2010, 11:01 AM
Record Breaker
#95
10-26-2010, 01:16 PM
Hall Of Fame
i would think (i could be mistaken here) that it would compare the reading from the output speed sensor on the transmission (measure if the output shaft is turning) to the reading from the rear wheel speed sensor, and if that is not moving then it engages the abs, im just speculating here but it makes some sense to me that way
#96
10-26-2010, 09:45 PM
You should have a start up diagnostic (ABS light on) when it starts and should go off after a few seconds. If you do not have this you should replace your module with a 4 wheel ABS module. It is a small box by the master cylinder that simply plugs in to a electrical harness.
There are 2 different systems,
1. 2 wheel ABS
2. 4 wheel ABS (which is actually 3 wheel) and this is what you have (as you said it) if you have ABS sensors on the front wheel bearings.
There are 2 different systems,
1. 2 wheel ABS
2. 4 wheel ABS (which is actually 3 wheel) and this is what you have (as you said it) if you have ABS sensors on the front wheel bearings.
#97
10-26-2010, 11:41 PM
Hall Of Fame
#98
10-28-2010, 05:42 PM
Ok, I will give it a shot, the replacement will be easy and the sensor will be cheaper than getting the ABS Control Module looked at. Just need the time to do it, got a busy work schedule coming up the next couple weeks, probably get to it around Thanksgiving week. Will post results afterwards...
#99
01-13-2011, 01:18 AM
Ok, I will give it a shot, the replacement will be easy and the sensor will be cheaper than getting the ABS Control Module looked at. Just need the time to do it, got a busy work schedule coming up the next couple weeks, probably get to it around Thanksgiving week. Will post results afterwards...
i experienced the same issue today. brake and abs lights turn on at startup and after a short time go off. But while driving both lights go on and stay lit until i turned off the truck.
This haven't happened before and today the problem appeared when i had the truck on 4 wheel drive (horrible weather here) wonder if 4wd on has anything to do with the lights turning on...
#100
01-13-2011, 09:45 AM
THE ULTI-MOD