ABS light
#1
Join Date: Jan 2012
Location: Southern West Virginia
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ABS light
My ABS light has been on for a while now, and my cruise quit working about the same time the light came on, today I decided to dig into it and see what was causing the light to stay on. The brake light bulb has been burnt out for while too, so I didn't know if both were on or just the ABS light was on. Fixed the brake light bulb first, and it wasn't staying on, just the ABS light was. I checked the fuse for the ABS, it and the cruise are on the same fuse by the way, and it was fine. Next I figured I would bleed the back brakes cause I had been wanting to do that too. When I took the bleeder plug completely out of the pass side rear to clean it out, no fluid came out. Hadn't started bleeding yet, just took the bleeder out. So, I thought well, maybe the RABS unit on the frame rail is bad. I changed it with one from a parts truck, bled the rear brakes, and the ABS light was still on. Next, I changed the ABS module behind the glove box with one from a parts truck, and that was it. The ABS light went off, and the cruise is working again. Since I had never changed the ABS module before, I learned something interesting today when I changed mine......on the back of the modules, there is a sticker that says "SINGLE REAR WHEEL ONLY", or "DUAL REAR WHEEL ONLY". I guess maybe the duallys having two extra wheels and 3 1/2" brake shoes vs the single wheel 3" brake shoes, it dumps the pressure to the rear wheel a little differently or something. Just one of those things that makes you go Hmmmmm.
#2
An interesting thought. I know that tractor apply harder in the rear. It offers better stopping power as the weight is disbursed heavy over the rear axles, and holds better control as well when braking.
Perhaps the DRW try to apply that concept as well.
One of the most overlooked functions of a vehicle is how it stops. I have wondered a few questions myself as to the ABS on our trucks. I deal with tractors and their systems are quite a bit different from what I can tell.
Perhaps the DRW try to apply that concept as well.
One of the most overlooked functions of a vehicle is how it stops. I have wondered a few questions myself as to the ABS on our trucks. I deal with tractors and their systems are quite a bit different from what I can tell.
#3
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Personally, I think the Rear ABS on these trucks are not that good of a system. I've thought about just plumbing around the RABS unit down on the frame rail and be done with it. I tow goose necks and 5th wheels, and I want more braking on my rear wheels when towing heavy. I don't like the thought of the ABS taking away my braking power to the rear wheels.
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#7
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Exactly. That's why I haven't done it. I don't want to do it, and then have the rear brakes lock up every time I touch the pedal.
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Personally, I think the Rear ABS on these trucks are not that good of a system. I've thought about just plumbing around the RABS unit down on the frame rail and be done with it. I tow goose necks and 5th wheels, and I want more braking on my rear wheels when towing heavy. I don't like the thought of the ABS taking away my braking power to the rear wheels.
no, the cruise will not work unless the module is good.
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