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?

 

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..

 

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

 

I replaced pads, rotors, bearings, seals, master cylinder.

 

If you don't immediately see it, follow the rear brake lines forward. Can't miss it.

Mike

 

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

 

Yup. That's the trick right there.

Mike

 

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!!

 

did you bench bleed the master cylinder before putting it on? if not, you will never get the system properly bled or get a solid pedal.

 

Old thread Tom.

 

aw crap!!! suckered into responding by a new guy.
and i usually check dates before posting too!