ABS light
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More Turbo
Joined: Jul 2016
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From: Boston
ABS light
My ABS light is on and we just replaced the proportioning valve - no difference. Anyone have experience trouble shooting what could be wrong? The light is annoying so I can always remove the bulb but id like to try and fix the issue. I don't see any sensors at the wheel at all.
Thanks
Thanks
Papa Smurf
Joined: Nov 2009
Posts: 1,080
Likes: 204
From: Woodstock, GA
The rear axle ABS is known to go bad, and is located on top of gear case. Check all wiring, as a short will turn the light on.
Going to assume you have front disc brakes as my old 95 did, so you should have ABS on both wheel bearings. The ABS sensor in on top of wheel bearing assembly, very hard to see with wheel on... even the brake rotor hides it pretty good. Check the wiring, especially if you go offroading in the truck.
If the ABS light comes on while driving... say after a hard right or left turn, then check your bearing assembly for play.
Several utube videos out there to look at.
Good Luck !
Going to assume you have front disc brakes as my old 95 did, so you should have ABS on both wheel bearings. The ABS sensor in on top of wheel bearing assembly, very hard to see with wheel on... even the brake rotor hides it pretty good. Check the wiring, especially if you go offroading in the truck.
If the ABS light comes on while driving... say after a hard right or left turn, then check your bearing assembly for play.
Several utube videos out there to look at.
Good Luck !
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More Turbo
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From: Boston
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Tuned
Joined: Mar 2005
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From: Lebanon, MO
This is from the workshop manual and the diagnostic connector is located under the glove box.
Diagnostic Trouble Codes, Retrieving
CAUTION: Care must be taken to connect only the black/orange stripe wire to ground. Connecting the red mating connector wire to ground will result in a blown fuse.
Verify the key is in the RUN position (engine does not need to be running). Next, locate the black RABS II diagnostic connector. The diagnostic connector has two mating halves (one of which has a black/orange wire connected to it). Disconnect the two halves.
Attach one end of a jumper wire to the black with orange stripe wire side of the diagnostic connector. Momentarily ground the other end of the jumper wire by connecting it to a good chassis ground for 1-2 seconds. Grounding this wire should start the yellow REAR ABS warning light flashing. If grounding this wire does not start the yellow REAR ABS warning light flashing, go to the Symptom Chart.
The code consists of a number of short flashes and ends with a long flash. Count the short flashes and include the following long flash in the count to obtain the code number. For example, three short flashes followed by one long flash indicates diagnostic trouble Code 4. The code will continue to repeat itself until the key is turned off. It is recommended that the code be verified by reading it several times. This code will be used later for system repair instructions. It should be written down for future use. Diagnostic trouble code 16 indicates that the anti-lock electronic control module detects normal system operation.
1996 Bronco/F-Series Workshop Manual
Kevin
Diagnostic Trouble Codes, Retrieving
CAUTION: Care must be taken to connect only the black/orange stripe wire to ground. Connecting the red mating connector wire to ground will result in a blown fuse.
Verify the key is in the RUN position (engine does not need to be running). Next, locate the black RABS II diagnostic connector. The diagnostic connector has two mating halves (one of which has a black/orange wire connected to it). Disconnect the two halves.
Attach one end of a jumper wire to the black with orange stripe wire side of the diagnostic connector. Momentarily ground the other end of the jumper wire by connecting it to a good chassis ground for 1-2 seconds. Grounding this wire should start the yellow REAR ABS warning light flashing. If grounding this wire does not start the yellow REAR ABS warning light flashing, go to the Symptom Chart.
The code consists of a number of short flashes and ends with a long flash. Count the short flashes and include the following long flash in the count to obtain the code number. For example, three short flashes followed by one long flash indicates diagnostic trouble Code 4. The code will continue to repeat itself until the key is turned off. It is recommended that the code be verified by reading it several times. This code will be used later for system repair instructions. It should be written down for future use. Diagnostic trouble code 16 indicates that the anti-lock electronic control module detects normal system operation.
1996 Bronco/F-Series Workshop Manual
Kevin
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Hotshot
Joined: Jan 2012
Posts: 11,132
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From: Southern West Virginia
This is from the workshop manual and the diagnostic connector is located under the glove box.
Diagnostic Trouble Codes, Retrieving
CAUTION: Care must be taken to connect only the black/orange stripe wire to ground. Connecting the red mating connector wire to ground will result in a blown fuse.
Verify the key is in the RUN position (engine does not need to be running). Next, locate the black RABS II diagnostic connector. The diagnostic connector has two mating halves (one of which has a black/orange wire connected to it). Disconnect the two halves.
Attach one end of a jumper wire to the black with orange stripe wire side of the diagnostic connector. Momentarily ground the other end of the jumper wire by connecting it to a good chassis ground for 1-2 seconds. Grounding this wire should start the yellow REAR ABS warning light flashing. If grounding this wire does not start the yellow REAR ABS warning light flashing, go to the Symptom Chart.
The code consists of a number of short flashes and ends with a long flash. Count the short flashes and include the following long flash in the count to obtain the code number. For example, three short flashes followed by one long flash indicates diagnostic trouble Code 4. The code will continue to repeat itself until the key is turned off. It is recommended that the code be verified by reading it several times. This code will be used later for system repair instructions. It should be written down for future use. Diagnostic trouble code 16 indicates that the anti-lock electronic control module detects normal system operation.
1996 Bronco/F-Series Workshop Manual
Kevin
Diagnostic Trouble Codes, Retrieving
CAUTION: Care must be taken to connect only the black/orange stripe wire to ground. Connecting the red mating connector wire to ground will result in a blown fuse.
Verify the key is in the RUN position (engine does not need to be running). Next, locate the black RABS II diagnostic connector. The diagnostic connector has two mating halves (one of which has a black/orange wire connected to it). Disconnect the two halves.
Attach one end of a jumper wire to the black with orange stripe wire side of the diagnostic connector. Momentarily ground the other end of the jumper wire by connecting it to a good chassis ground for 1-2 seconds. Grounding this wire should start the yellow REAR ABS warning light flashing. If grounding this wire does not start the yellow REAR ABS warning light flashing, go to the Symptom Chart.
The code consists of a number of short flashes and ends with a long flash. Count the short flashes and include the following long flash in the count to obtain the code number. For example, three short flashes followed by one long flash indicates diagnostic trouble Code 4. The code will continue to repeat itself until the key is turned off. It is recommended that the code be verified by reading it several times. This code will be used later for system repair instructions. It should be written down for future use. Diagnostic trouble code 16 indicates that the anti-lock electronic control module detects normal system operation.
1996 Bronco/F-Series Workshop Manual
Kevin
When you click on the link Kevin posted go to section 06: Brake System and click on it. Then go to section 06-09A: Brake System, Anti-Lock, Rear and click on that. Go down to Symptom Chart--Rear Brake Anti-Lock Control and click that. That gives you all the codes for the ABS and pinpoint tests for each code.
I have fought with my ABS for a while now. Swapped out the valve on the frame with ones from two other trucks, and swapped out the module behind the glove box with ones from three other trucks. The code I was getting each time took me through a trouble shooting procedure that ended up saying to change the module each time. Each time I changed the module, the light went off and stayed off for a while, but would come back on with the same code. I have checked all the wiring, but I think something is killing my modules. I'm tired of chasing it, so I am doing away with the ABS on my truck all together. I'm gonna bypass the valve on the frame and just unplug the module behind the glove box.
Senior User
Joined: Sep 2012
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From: Oklahoma
When op made a thread about buying a replacement RABS valve, I wondered what made him think his was bad. No answer. And most likely no diagnostics.
Need to pull the codes and do the pinpoint tests....
Need to pull the codes and do the pinpoint tests....
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Justin89
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Apr 6, 2012 10:52 PM