92 expo rear brakes not working , PROBLEM

[gforceman]

ok , i read through alot of posts here retaining to RABS .. but when i lifted the rear end off the ground the drivers rear doesnt work at all and the pass works very little if any , the last time i bled the rears i can only bleed if the key is in the ON position or motor running , key off they wont bleed , i was thinking the rear wheel cylenders are stuck or frozen , im not getting enough braking power to the front wheels , new pads , hoses and rotors and bled , i know the last owner replaced the rabs modual with one from a junkyard cause of an abs light im not getting a light now , just no braking to rear wheels,, any thoughts thanks !!

 

[TedJ]

You should be able to bleed them at any time. I would suspect the RWABS valve has rusted shut. You can check for crimped or damaged lines, but almost everyone who has ever complained of no fluid to the rear brakes has had a blocked RWABS valve.

Even if the rear brakes were completely trashed, they would still bleed. You should pull the drums off and check that the adjusters haven't seized, and that they are in adjustment.

 

[gforceman]

they bleed with the key on but, no brake apply when pedal is used after bleed , im gonna just bypass the rabs and replace both rear wheel cylenders , cheap to do that 23 bux then ill go from there,

 

[gforceman]

Rabs is BAD !! gonna do the bypass and replace the rear wheel cylenders !!