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ABS and brake light on, speedo works

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Old 08-29-2009, 01:14 PM
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Default ABS and brake light on, speedo works

Hey all,
New to the forum. Did a search for these symptoms and found many similars. They all point to sensor on rear diff. but also include speedo not working properly. Haven't checked my sensor yet, but I will this afternoon. Since my speedo does seem to be working, anybody have other suggestion?
Thanks in advance,
Chuck
 
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Old 08-29-2009, 02:27 PM
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Mine did the same thing. It was still the sensor.
 
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Old 08-30-2009, 10:49 AM
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sounds like 40$ to me. (rwss)
 
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Old 08-30-2009, 11:20 AM
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If it is not the rear diff speed sensor then the range of possibilities is greatly expanded. It is easier to just replace it.

That said, keep in mind that you probably need the KIT, not just the sensor. At least on my 98 all the auto parts stores sell a sensor with the plug on the opposite side as normal. The kit includes a cable extender. (took me three stores to figure this out...including Napa). The dealership has the right one if nothing else.
 
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Old 08-31-2009, 05:27 PM
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same symptoms on my 99 1500 4x4. brake and abs lights on but speedo worked fine.sensor was perfect fit from autozone. i think you need a deep socket and open end if i remember right. really easy though.
 
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Old 08-31-2009, 07:24 PM
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My abs light and brake light are on and i bought a new rear wheel speed sensor on ebay for $27.99. I put it in and the lights are still on. I'm not sure what to replace next since this didnt solve my problem. My speedo works fine...just my brake and abs lights are on
 
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Old 08-31-2009, 07:31 PM
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Don't get confused fellas. You have the Speed Sensor on the diff for the speedometer. You also have an ABS Sensor (98 model and up IIRC). on the backing plates for the rear drum. If the ABS sensor goes bad, or breaks( I broke 3 on my 99 2500, stupid non working trailer brakes) it will light the Brake and ABS lights. Replace the ABS sensor disconnect the battery, and clear the PCM. Hook the battery back up, and POOF! No more lights on.
 
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Old 08-31-2009, 07:35 PM
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I have a 1997 dodge ram 1500...

I think i may take it to a dealership to scan the brake system because the lights annoy me
 
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Old 08-31-2009, 08:38 PM
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The 97 and down use a speed sensor on the tranny for speedo and one on the rear for abs. Check the wiring connections, clean them and use die electric grease on them and reconnect. try pushing them in and out a few times to get a good connection. That is what I had to do.
 
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Old 08-31-2009, 09:03 PM
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Alright, thanks. I'll have to try that this week when i replace my driver side wheel bearing...

By the way, nice cowl hood. Wanna sell it?
 


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