[aznmark]

So I pulled my brake code that caused my abs light to come on. And its code 4that
Open or Shortened Valve switch or harness.
I don't know what that means. Does anyone know and if so wheres it located and what would be my best solution.
I have searched for pictures and diagrams and keep getting nothing. Well nothing useful.

 

[El Kabong]

That switch is part of the RABS valve itself. On my 90 the RABS valve is located on the inside of the driver's side frame rail, sort of under & a little forward of the master cylinder. It's a cast looking piece with brake lines, a bleeder, & a short group of wires to an electrical connector.

Is your Red Brake light also lit? If so, there's a few tests to run before tracing down the code info. Click on the "Common Replies to FAQs" link in my sig & go to post 8. Section "C" has you check a few things before following Code 4. If those are ok, Code 4 tells you that there is a problem with that switch, the wires running to it, or the RABS module itself. There's a testing routine for code 4 to pinpoint the problem down lower in that same post 8.

If the Red Brake light is not lit, then section "D" tells you to go straight to the Code 4 tests.

This thread: Brake and Rear ABS lights on also has some info & more code links, including a pic of the RABS valve in post 20.

 

[miesk5]

yo!

AS EL K Advised, in that Post;
http://fullsizebronco.com/forum/showthread.php?t=5830&page=2

RABS Diagnosis; except 93-96 (click NEXT to View more pages)
Source: by Jem270 at http://fullsizebronco.com/forum/showthread.php?t=5830&page=2
Flashed 4 Times troubleshooting begins on File 49 of 56-
R
ABS Valve & Yellow Warning Light Location Diagram in 90-92 Bronco & 90-96 F Series
Source: by Steve83 http://www.supermotors.net/registry/media/280872_1