Abs light on
Fleet Owner
Joined: Oct 2005
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From: Kentucky
Fleet Owner
Joined: Oct 2005
Posts: 20,789
Likes: 1,753
From: Kentucky
Looks like I may have misspoke a bit. The wire that you ground is part of C159. One side goes to power, the other is the one going to the RABS control module. The wire connected to the RABS module is what gets grounded after disconnecting C159.
Here is another diagram from Ford on the location of C159:
Here is another diagram from Ford on the location of C159:
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Cross-Country
Joined: Oct 2022
Posts: 65
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From: seattle
i was not able to the abs light to turn back on. it keeps turning on and off, and always happens to turn off when im going to test it. i think i found the problem, the abs pump relay in the engine fuse box is gone, completely missing so that is probably what it is.
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Fleet Owner
Joined: Oct 2005
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From: Kentucky
Your truck has Rear Anti-Lock Brakes (RABS). The Bronco has 4 Wheel ABS which uses that relay. Yours does not. Since your truck uses RABS II there is a store function so you really need to pull the codes.
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I would say find your codes definition, and then go from there. For example, if the brake switch isnt making a good connection at startup, the abs light will come on. an issue with the speed sensor to the RABS module can also turn it on. I , personally, ended up disconnecting my RABS module to turn the light off. Anytime I tried for a code I got a code 16. But my rear brakes are less than ideal, the fluid is nasty. So I figure I will have to address all that anyway.
Fleet Owner
Joined: Oct 2005
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From: Kentucky
As previously stated some are not fans of the RABS system. I have found it does work for me so I have kept the system intact on the various OBS trucks I have owned. Before worrying about cost, pull the codes.
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Cross-Country
Joined: Oct 2022
Posts: 65
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From: seattle
Tried pulling the codes for over an hour last night, would not work. I separated the connecter and grounded the oranges/black wire. The jumper cables would not fit so I used a wire. Could that be why is was not working?