1992 F-150 ABS Warning Light
#1
08-25-2006 | 07:00 PM
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#2
08-26-2006 | 09:11 AM
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Joined: Apr 2006
Posts: 189
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From: Manassas, VA
My 97 4X4 dos the same thing and ford diagnosed it to be the ABS module. With is very expensive to replace it is a dealer part unless you want to go to the junk yard and get a used one. I was quoted about 500 to replace. I was also told that it could be the VSS(viriabl speed sensor) which is located on the front of the rear diff. try cleaning it or replacing it that could fix your problem.
#3
08-26-2006 | 12:10 PM
Senior Member
Joined: Oct 2002
Posts: 7,268
Likes: 111
From: St. Louis (Out in the woods)
92 Abs Rabs I
The 97 uses a different (a bit more advanced) system than does the 92. While there are a great many similarities between the systems, whatever diagosis was obtained on YOUR truck probably is probably not relevent since the original poster's truck hasn't been diagnosed.
SR1980:
It is necessary to pull the ABS codes so you understand WHY the ABS light is coming on. Until you have this information, any other work is just hanging parts on the truck.
Here are the instructions for pulling the code(s) on the 92 straight fromthe factory service procedure. Read them carefully so that you are able to understand the process.
Once you have a flash code, the proper diagnostic can be followed.
For the F-series, the location of the RABS diagnostic test connector is given as behind the lower right corner of the glovebox on the outboard section of the instrument panel.
Steve
SR1980:
It is necessary to pull the ABS codes so you understand WHY the ABS light is coming on. Until you have this information, any other work is just hanging parts on the truck.
Here are the instructions for pulling the code(s) on the 92 straight fromthe factory service procedure. Read them carefully so that you are able to understand the process.
lashout Codes
Whenever the yellow REAR ABS light comes on during normal operation, a flashout code may be obtained to aid in problem diagnosis. If the vehicle is shut off before the code is read, the code will be lost. In some cases, the code may reappear when the vehicle is restarted. In other cases, the vehicle may have to be driven to reproduce the problem and, if the problem was associated with an intermittent condition, it may be difficult to reproduce. Therefore, whenever possible, it is recommended that the code be read before the vehicle is shut off.
WARNING:
PLACE BLOCKS BEHIND THE REAR WHEELS AND IN FRONT OF THE FRONT WHEELS TO PREVENT THE VEHICLE FROM MOVING WHILE THE FLASHOUT CODE IS BEING TAKEN.
NOTE:
If the red BRAKE light is also on, due to a grounding of the fluid level circuit (perhaps low brake fluid), no flashout code will be flashed and the REAR ABS light will remain on steadily.
NOTE:
If there is more than one system fault only the first recognized flashout code may be obtained.
Obtaining The Flashout Code
A flashout code may be obtainedonly when the yellow REAR ABS light is on. No code will be flashed if the system is OK. There are certain faults (those associated with the fluid level switch or loss of power to the module) that will cause the system to be deactivated and the REAR ABS light to be illuminated, but will not provide a diagnostic flashout code.
Before obtaining the flashout code, drive the vehicle to a level area, and place the shift lever in PARK for automatic transmissions and NEUTRAL for manual transmissions.
Notice whether the red BRAKE light is on or not (for future reference) and then apply the parking brake.
Keep the ignition key in the ON position so that the code will not be lost.
WARNING:
PLACE BLOCKS BEHIND THE REAR WHEELS AND IN FRONT OF THE FRONT WHEELS TO PREVENT THE VEHICLE FROM MOVING WHILE THE FLASHOUT CODE IS BEING TAKEN.
To obtain the flashout code, locate the RABS diagnostic connector (with the black/orange wire), and attach a jumper wire to it. Momentarily ground it to the chassis. When the ground is made and then broken, the REAR ABS light should begin to flash.
NOTE:
If the red BRAKE light was on (as noticed before the parking brake was applied), the problem may be with the low fluid level circuit and, in this case, no flashout code will be flashed and the light will remain on steadily.
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 Flashout Code Four. 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. In addition, the first code flashed may be too short because it may have been started in the middle. It should be ignored.
Flashout Codes Chart
The possible flashout codes are listed and explained in the «Flash Codes Chart» following the diagnosis guides in this section. Note that Codes 1 and 16 are not used.
When a code has been obtained, go to the Test indicated by the number of flashes. For example, if the flashout code is nine, go to Flashout Code 9 for the next step in diagnosing the problem.
Whenever the yellow REAR ABS light comes on during normal operation, a flashout code may be obtained to aid in problem diagnosis. If the vehicle is shut off before the code is read, the code will be lost. In some cases, the code may reappear when the vehicle is restarted. In other cases, the vehicle may have to be driven to reproduce the problem and, if the problem was associated with an intermittent condition, it may be difficult to reproduce. Therefore, whenever possible, it is recommended that the code be read before the vehicle is shut off.
WARNING:
PLACE BLOCKS BEHIND THE REAR WHEELS AND IN FRONT OF THE FRONT WHEELS TO PREVENT THE VEHICLE FROM MOVING WHILE THE FLASHOUT CODE IS BEING TAKEN.
NOTE:
If the red BRAKE light is also on, due to a grounding of the fluid level circuit (perhaps low brake fluid), no flashout code will be flashed and the REAR ABS light will remain on steadily.
NOTE:
If there is more than one system fault only the first recognized flashout code may be obtained.
Obtaining The Flashout Code
A flashout code may be obtainedonly when the yellow REAR ABS light is on. No code will be flashed if the system is OK. There are certain faults (those associated with the fluid level switch or loss of power to the module) that will cause the system to be deactivated and the REAR ABS light to be illuminated, but will not provide a diagnostic flashout code.
Before obtaining the flashout code, drive the vehicle to a level area, and place the shift lever in PARK for automatic transmissions and NEUTRAL for manual transmissions.
Notice whether the red BRAKE light is on or not (for future reference) and then apply the parking brake.
Keep the ignition key in the ON position so that the code will not be lost.
WARNING:
PLACE BLOCKS BEHIND THE REAR WHEELS AND IN FRONT OF THE FRONT WHEELS TO PREVENT THE VEHICLE FROM MOVING WHILE THE FLASHOUT CODE IS BEING TAKEN.
To obtain the flashout code, locate the RABS diagnostic connector (with the black/orange wire), and attach a jumper wire to it. Momentarily ground it to the chassis. When the ground is made and then broken, the REAR ABS light should begin to flash.
NOTE:
If the red BRAKE light was on (as noticed before the parking brake was applied), the problem may be with the low fluid level circuit and, in this case, no flashout code will be flashed and the light will remain on steadily.
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 Flashout Code Four. 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. In addition, the first code flashed may be too short because it may have been started in the middle. It should be ignored.
Flashout Codes Chart
The possible flashout codes are listed and explained in the «Flash Codes Chart» following the diagnosis guides in this section. Note that Codes 1 and 16 are not used.
When a code has been obtained, go to the Test indicated by the number of flashes. For example, if the flashout code is nine, go to Flashout Code 9 for the next step in diagnosing the problem.
Once you have a flash code, the proper diagnostic can be followed.
For the F-series, the location of the RABS diagnostic test connector is given as behind the lower right corner of the glovebox on the outboard section of the instrument panel.
Steve
#5
08-30-2006 | 12:54 AM
Senior Member
Joined: Oct 2002
Posts: 7,268
Likes: 111
From: St. Louis (Out in the woods)
Originally Posted by SR1980
Since I'm new to the forum, how exactly do I get to the diagnostic section you mentioned to find the codes?
If you have pulled the flash code, I can look it up and post that particular piece of data. What is presented in the service documentaion is in a "wrong" format to easily post the whole section, it would be about 20-25 pages for the whole chart.
If necessary, have your mechanic do the diagnostics.
Steve
#6
06-22-2013 | 01:25 PM
Junior Member
Joined: Jun 2013
Posts: 1
Likes: 0
From: mechanicsville, va
The 97 uses a different (a bit more advanced) system than does the 92. While there are a great many similarities between the systems, whatever diagosis was obtained on YOUR truck probably is probably not relevent since the original poster's truck hasn't been diagnosed.
SR1980:
It is necessary to pull the ABS codes so you understand WHY the ABS light is coming on. Until you have this information, any other work is just hanging parts on the truck.
Here are the instructions for pulling the code(s) on the 92 straight fromthe factory service procedure. Read them carefully so that you are able to understand the process.
Once you have a flash code, the proper diagnostic can be followed.
For the F-series, the location of the RABS diagnostic test connector is given as behind the lower right corner of the glovebox on the outboard section of the instrument panel.
Steve
SR1980:
It is necessary to pull the ABS codes so you understand WHY the ABS light is coming on. Until you have this information, any other work is just hanging parts on the truck.
Here are the instructions for pulling the code(s) on the 92 straight fromthe factory service procedure. Read them carefully so that you are able to understand the process.
Once you have a flash code, the proper diagnostic can be followed.
For the F-series, the location of the RABS diagnostic test connector is given as behind the lower right corner of the glovebox on the outboard section of the instrument panel.
Steve
Last edited by arch713; 06-22-2013 at 01:29 PM.