Help with ABS Issue Please....
Thread Starter
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Senior User
Joined: Aug 2003
Posts: 431
Likes: 0
From: East TN
Help with ABS Issue Please....
2000 XLT Excursion 72K Miles.
ABS light came on several years ago driving on the interstate at highway speeds. Replaced rear VSS and light went out.
ABS light came on last week driving on the interstate at highway speeds.
Cleaned rear VSS and reinstalled. ABS light still on.
Installed new rear VSS, checked all wiring connections, disconnected battery with light switch on for 30 minutes, started, idle for one minute and idle for one minute with AC on. ABS light is still on.
Note: If I start the engine with the brakes applied the ABS light goes off as normal. I can then put the truck in gear and the light stays off. When I release the brake pedal the ABS light comes on and stays on.
The speedometer and cruise control are both functioning as normal.
Any input appreciated very much. This thing is driving me nuts.
ABS light came on several years ago driving on the interstate at highway speeds. Replaced rear VSS and light went out.
ABS light came on last week driving on the interstate at highway speeds.
Cleaned rear VSS and reinstalled. ABS light still on.
Installed new rear VSS, checked all wiring connections, disconnected battery with light switch on for 30 minutes, started, idle for one minute and idle for one minute with AC on. ABS light is still on.
Note: If I start the engine with the brakes applied the ABS light goes off as normal. I can then put the truck in gear and the light stays off. When I release the brake pedal the ABS light comes on and stays on.
The speedometer and cruise control are both functioning as normal.
Any input appreciated very much. This thing is driving me nuts.
Postmaster
Joined: Jan 2005
Posts: 4,424
Likes: 12
From: BC Canada
When was the last time the brakes were done, properly bled, change of rotors and pads, lube caliper pins. Its possible, that any one of the sensor wires is broken to the rotor sending wheel. Unless this is a 2000 with only rear antilock, what about the two front sensors. I beleive there is a sensor wheel behind the rotor and the wire to it is easily damaged by rocks and branches.
Also, its possible other sensors like the front to rear brake warning switch are triggering ABS light. This can happen if one side is not moving properly, bleeding brakes incorrectly.
These are all suggestions, I know this is frustrating stuff. I would try a Chiltons shop manual for your truck, worth their weight in gold for troublesome stuff like this....
Also, its possible other sensors like the front to rear brake warning switch are triggering ABS light. This can happen if one side is not moving properly, bleeding brakes incorrectly.
These are all suggestions, I know this is frustrating stuff. I would try a Chiltons shop manual for your truck, worth their weight in gold for troublesome stuff like this....
Lead Driver
Joined: May 2003
Posts: 9,303
Likes: 48
From: Lyndonville, Vermont
If he brings it in they can diagnois the system via scanner to tell right off whats wrong. You could guess for years and not figure it out..Those manuals don't get into abs systems if I remember correctly.
Dick
Dick
Thread Starter
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Senior User
Joined: Aug 2003
Posts: 431
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From: East TN
No brake work on this truck. Mostly highway miles. Pads and rotors are good to go. Fluid clean and full. My first hand inspection - not a shop.
I've checked the sensor wires to the front wheels and everything looks good including the connections behind the wheel wells.
I plan to remove the front wheels tomorrow to get a better look. If necessary I'll pull the rotors and replace the front pads while I'm in there. Yes I replace pads without turning rotors. Been doing it for years with very good results on lot's of vehicles.
On one search I did, I found a reference to a diagnostic check that would indicate which one of the front sensors - L or R - is bad and save the hassle of checking both. The post also indicated that if both front sensors are good that the culprit would then be the ABS module = $$$$$. Anybody have any insight on this?
No rocks or tree limbs. I off-road in a Toyota LC.
Don't ban me please. LOL
I've checked the sensor wires to the front wheels and everything looks good including the connections behind the wheel wells.
I plan to remove the front wheels tomorrow to get a better look. If necessary I'll pull the rotors and replace the front pads while I'm in there. Yes I replace pads without turning rotors. Been doing it for years with very good results on lot's of vehicles.
On one search I did, I found a reference to a diagnostic check that would indicate which one of the front sensors - L or R - is bad and save the hassle of checking both. The post also indicated that if both front sensors are good that the culprit would then be the ABS module = $$$$$. Anybody have any insight on this?
No rocks or tree limbs. I off-road in a Toyota LC.
Don't ban me please. LOL
Last edited by spartan; Mar 4, 2006 at 05:13 PM.
Thread Starter
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Senior User
Joined: Aug 2003
Posts: 431
Likes: 0
From: East TN
You are correct. Those manuals don't do squat for ABS diagnostics. After I look at it I figure I'll give in and go for the shop diagnostic. Thanks guys.
Last edited by spartan; Mar 4, 2006 at 05:51 PM.
New User
Joined: Feb 2006
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Hi, I'm new here - been lurking and picked up some good info. I had ABS light and check engine light come on on my 2000 F350 recently so I had a friend with a code reader read the codes, we drove it with the scanner hooked up and it showed the front sensors working and not the rear, changed and fixed. I would suggest having a friend or shop read the codes and see if its something you want to fix yourself. I am thinking about buying a code reader, it could pay for itself quickly by not having to take a vehicle to the shop.
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Thread Starter
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Senior User
Joined: Aug 2003
Posts: 431
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From: East TN
I'm thinking the same here about getting a code reader. Any ideas on the best bang for the buck reader?
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