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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.
 

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Driving Stuff Henry Built
-90 xlt, 351w, e4od, man 1356, 3.55, sag, warn hubs, 35s. -73, 400, np435, d20j twin, 35s
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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.
 

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