RABS VALVE?
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Senior User
Joined: Aug 2006
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From: San Mateo
RABS VALVE?
TRYING TO FIGURE OUT WHERE THE RABS VALVE IS LOCATED AND WHAT IT LOOKS LIKES. DID A FRONT BRAKE JOB, BLED THE BRAKES BUT STILL GETTING NO PRESSURE. SOMEONE SAID TO BLEED THE RABS VALVE TOO. WHERE IS IT?
Postmaster
Joined: Aug 2005
Posts: 4,728
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From: Cleveland, TN
It's on the inside of the frame, right under your feet when you are sitting in the drivers seat.
It's a cast iron chunk of metal with a brake line at the front , a brake line at the back and a wire harness plugging into about the middle..
It's a cast iron chunk of metal with a brake line at the front , a brake line at the back and a wire harness plugging into about the middle..
Fleet Owner
Joined: Oct 2005
Posts: 20,785
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From: Kentucky
Unless you let the master cylinder go dry during the brake job and bleeding process the RABS and rear brakes will not be affected. There is zero connection between two except the reservoir of the master cylinder.
What kind of "brake job" did you do? Replace calipers? If so did you re-install them with the bleeder screw on the top side?
A photo of a RABS module
What kind of "brake job" did you do? Replace calipers? If so did you re-install them with the bleeder screw on the top side?
A photo of a RABS module
Fleet Owner
Joined: Oct 2005
Posts: 20,785
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From: Kentucky
That one item right there is going to be the trigger point. Yes, you will need to bleed the RABS as well as the rear brake cylinders. It's not too bad. I just went through this ordeal about 2 months ago. My RABS was covered in rust, amazingly the bleeder screw popped loose rather easily.
I did cheat a little......I have been periodically spraying the bleeder screw with PB Blaster for about a year. I knew one day I was going to have to crack that baby open
I did cheat a little......I have been periodically spraying the bleeder screw with PB Blaster for about a year. I knew one day I was going to have to crack that baby open
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Joined: Jan 2001
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From: Poway, CA
Mike
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I just replaced the RABS on my 1993 F-150 XLT--cured a long time issue with the brakes locking up, flashing codes, and other issues. A friend and I got three out of a wrecking yard--installed the best looking one--problem solved and we have two spares. Cost--$9.00--yep-the guy lots us have all three for that one price. It was well worth the two hours of hunting around and crawling under trucks!!
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