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Rear Antilock Brake Light On

7 messages,  Last post on Feb 26, 2009 at 2:47 PM

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#1 of 7 Rr. Anti-lock light on by lburnash May 16, 2007 (12:00 pm)
I have a '92 Rodeo with 171K on the clock and last week the Rr. Anti-lock light came on. The red brake light is also on even with the E-brake disengaged. There is a low whine coming from the rear end that increases with speed and a rapping sound, similar to the noise a U-joint would make. I have visually inspected everything and before I tear into it, I'd like some advice as to what it might be and weather, given its age, it's worth doing. Any assistance is greatly appreciated.   LBurnash Replies to this message: joshmcs (Jul 12, 2007 10:24 am) davidtc (Dec 29, 2007 7:40 am) solla968 (Apr 24, 2008 10:01 am) racerxp (Apr 24, 2008 10:11 am)
#2 of 7 Re: Rr. Anti-lock light on [lburnash] by joshmcs Jul 12, 2007 (10:24 am)
Replying to: lburnash (May 16, 2007 12:00 pm) I have a '97 rodeo with a similar issue. One day I heard a very bad squealing whenever I applied the brakes. Then it went away. Now about 3 weeks later I have the parking brake and RABS lights coming on at the same time. I've been looking around and one possibility is the rear bearrings assembly. I would also check out your rear brake shoes to make sure they're in good order.   Edit: There are two sensors to check as well, to make sure of clean contacts or possible replacement. One is the rear speed sensor. The other is the rear ABS sensor location on top of the rear differential. Make sure the contacts are clean and find out the resistance values that should be read and you can find out if they are any good by using a plain multi-meter. Another option is to go to a repair shop to get the codes diagnosed but that would cost a little more money.
#3 of 7 Re: Rr. Anti-lock light on [lburnash] by davidtc Dec 29, 2007 (7:40 am)
Replying to: lburnash (May 16, 2007 12:00 pm) I just went through this with my son's Rodeo. The cause of your Rear ABS light and the Brake light on at the same time is the Vehicle Speed/ABS sensor located in the differential of the rear end, if you have the two wheel drive. It sounds like the sensor has broken and is hitting the pick-up in the differential. This could be a major problem if not corrected quickly as it may get into the gears and cause further damage. Depending on which electrical system you have there is a way to find the diagnostic code for this, I highly recommend buying a good book. A code "9" for high resistance or code "10" for low resistance should come up for the rear ABS sensor. The sensor is not hard to change, but is hard to find the new part. It will also cost you approximately $90.00, depending on who you know in the parts market. One bolt holds it in, it may be hard to pull out as it may have a vacuum on it, but it will come out. Once you have it out, if it's not visibly damaged, you can test it with a volt-ohm meter. It should read between 900-2000 ohms resistance on the meter. Anything other than that and it is bad. Once you replace it, crank the vehicle up and shut it down the code should clear. I hope this helps, David. Replies to this message: solla968 (Apr 24, 2008 10:01 am)
#4 of 7 97 Rodeo ABS LIGHT/SPEEDOMETER by dsteff62 Apr 11, 2008 (5:08 am)
I have a 97' Isuzu Rodeo 2WD with the 3.2 V6 engine. Recently the speedometer quit working and the abs light came on. The common consensus was to replace the vss sensor on the rear differential. I have installed a new sensor and this did not correct the problem. The hand held diagnostic gives a code for low voltage from the sensor. I would appreciate any suggestions on what to try next. Thanks!
#5 of 7 Re: Rr. Anti-lock light on [davidtc] by solla968 Apr 24, 2008 (10:01 am)
Replying to: davidtc (Dec 29, 2007 7:40 am) I have the same problem and i took it to a dealer. They told me it would cost $2000 for them to do it. Do i need special equipment to change it or something?
#6 of 7 Re: Rr. Anti-lock light on [lburnash] by racerxp Apr 24, 2008 (10:11 am)
Replying to: lburnash (May 16, 2007 12:00 pm) There was a recall for the anti-lock braking system early on. Maybe you can get this addressed under the recall notice.
#7 of 7 OLDSMOBILE INTRIGUE 2000 by msctt750 Feb 26, 2009 (2:47 pm)
HEY, GUYS    I have a antilock and trac warning light that has been on since about a year know.My grandfather has a 1997 oldsmobile arua and he has the same problem with the light and yes I have already took the cars to my mechanic and they told us that it is a wheel bearing sensor and not to worry about it but we both just don`t feel right thinking that there is a brake problem.

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