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Don't know if this wil help ya'll but I just installed an 8.8 in my 87 this weekend and put all new brake lines on it. My brake fluid was way nasty so while I was bleeding the brakes I replaced the fluid and bled all 4 wheels till I got clear fluid on all 4 corners. My RABS light is no longer on but I have not driven the truck any distance yet, just to turn it around for the front lift kit so it may come back but I'm hoping not. But the fluid that came out was black as night and cruddy. I also had to replace a bleeder valve on the right front as it would not pass fluid at all. Hope this helps.
maybe I jarred loose some gunk. I have read in the past someone fixed either an ABS issue or not fluid to rear wheels by changing out the "coupler" in the brake line just under the driver’s door. Also on the 2nd gen the ABS valve is on the frame rail below the master cylinder, all others is back by the left rear wheel.
Ohhh I hate quick TRS times me out!!!! Let's see if I can recall what I wrote.
Okay, I was lamenting wrenching all weekend when the weather was just gorgeous, oh well...
On the 2nd gen the ABS module control box is under the dash just to the left of the tranny tunnel. It’s a gold box about 1'X 4"X6" and the connector faces the firewall. I had changed that on mine too, to no avail. I also shot all the wiring to the ABS valve and all seemed to be correct. Mine was still on until I changed the fluid.
Oh yeah, the bleeding. Took about 15 or so pumps for the rear and 10 for the front to start getting clear fluid. I used a cool little one way bleed valve I got from NAPA for $4.00. Worked like a champ and no killing my hand using a vacuum pump or one of the kids and open, down, close, up, etc. Just pump the brakes and the oneway took care of the rest. Cheers!
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