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Abs and Brake light on

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  #1  
Old 07-07-2009, 10:57 PM
jtridgerunner jtridgerunner is offline
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Cool Abs and Brake light on

I've got an '03 Dodge Cummins 2500, manual trans. The brake and Abs light stay on constantly. My speedo works properly, and brakes (including parking brake) preform great on the truck. Brake pads have plenty of pad on them. The truck does have a Bully Dog programmer. Has anyone heard of using the programmer to set new tire sizes can cause these lights to come on? Any ideas on how to turn these lights off?
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  #2  
Old 07-07-2009, 11:45 PM
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You do not just want to turn them off. They are on for a reason.

ABS on solid means your ABS is currently inoperable.

Most ABS issues are usually the speed sensors. Basically each ABS wheel has a speed sensor. If the sensor sees your wheel not spinning, but your computer says you are moving the ABS kicks on. An issue can arise if the sensors malfunction, thinking your wheel is not spinning and therefore kicking on your ABS when in fact there is no need for it. Somehow the system can detect this kind of fault and will throw the light and kill the ABS until fixed. I could be wrong but I think it detects by knowing you are not braking, are moving, yet the speed sensor reports a stopped wheel....

Long winded, I know.... So here is a question.... Just prior to your light coming on did you notice your ABS kicking on under normal braking conditions?
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Old 07-08-2009, 01:15 PM
Cartalk2 Cartalk2 is offline
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Check all your fuses? Happened to me when towing. Trailer lights shorted and took out fuse. Replaced fuse and ABS back to normal.
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Old 07-08-2009, 07:08 PM
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My '06 did that when I accidentally started the truck with a fuse removed. It was either 30 or 31, can't remember which one. It's labeled as a spare but most definitely is not.
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Old 07-08-2009, 09:13 PM
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I believe you need a rear wheel speed sensor that is mounted on the top of the rear differential...
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Old 07-09-2009, 08:47 PM
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Finally made it to a computer to see what you guys thought.
1) Didnt notice ABS not working, will have to check that. Have yet to stomp the brakes hard enough for them to try to lock up.
2) Will check all fuses soon. Never thought about that being a possible cause, but now i could see how it might be.

Is it odd that both the Brake and ABS light is on? I've seen just a ABS light come on, when it has been an ABS problem.
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Old 07-09-2009, 09:18 PM
jtridgerunner jtridgerunner is offline
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My fuses 30 and 31 are both empty but labeled as spares. Going to fuses in them when i get to the shop and see if that helps.
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Old 07-10-2009, 09:31 PM
jtridgerunner jtridgerunner is offline
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Talking Update

Found a blown fuse, replaced it and the lights went out. I pull several different trailers, so one of them may have poped the fuse. Am going to keep close tabs on it now and see if i can figure out what blew the fuse. Thanks for the help guys.
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Old 07-10-2009, 10:22 PM
BrianSudokhoi02 BrianSudokhoi02 is offline
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Glad to hear it was a cheap and easy fix.
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Old 07-13-2009, 09:04 PM
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Glad to see it was an easy fix...
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Old 03-10-2010, 10:56 AM
wjohn1980 wjohn1980 is offline
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Default Speed Sensor?

This just happened to me (06 Ram 2500 5.9) on my way back from South Carolina over the weekend... I wasnt towing and checked the fuses and they are all good... Ordered a speed sensor a few days ago and got it today. Can someone help me out on how to change this thing? I know its on the rear diff somewhere... Any help is appreciated as always...
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Old 12-18-2010, 09:53 PM
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So while driving today I had my abs and brake light come on. Does anyone have the part number or something of the sensor that goes on the rear diff. or some other way I can find the part?
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Old 12-20-2010, 08:47 PM
joshmopar joshmopar is offline
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Ok here yall go.
wjohn1980: Its on the top of the rear diff. You will se it. If looking at the diff from the front it will be on the right side on top. There is a bolt holding it on. Right on top. If i remember correct its at the front. Take the bolt out and unhook wire. Then take a small flat head screw driver and gently pry it out. Oh spray with wd 40 or something. If it breaks off push it through and remove diff cover dran diff clean diff and put back together.

mblanco2000: go to parts store. tell desk guy year/make/model and the part you need. Go home and read above part of post. then once you read this fix truck.

Hope this helps

Josh
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Old 12-20-2010, 08:47 PM
 
 
 
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03, 96, 97, abs, blowing, brake, bully, cummins, diesel, dodge, dog, fuse, light, ram, sensor

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