Rear ABS light
Elder User
Joined: Mar 2006
Posts: 590
Likes: 1
From: Venetia, PA
I know this is a stupid questions and I dont mean to insult your intelligence, but do you have enough brake fluid in the resivour? If the level is down too low, the ABS light will come on on the dash.
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Senior User
Joined: Sep 2007
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Actually now that you mentioned it it's not a dumb question because I am in the process of replacing the rear brakes totally and I have drained the lines, I believe I am the dumb one, I will be replacing the lines and wheel cylinders tonight, once I bleed the system again I will check to see if the RABS light is still on.
Senior User
Joined: Mar 2004
Posts: 491
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From: Boyd,TX
Rob, If I were you I would get a subscription to alldatadiy for that truck of yours. The wiring diagrams are pretty good and they have other useful info as well. I tried to post one in this reply, but I'm not smart enough to pull it off. 
Elder User
Joined: Mar 2006
Posts: 590
Likes: 1
From: Venetia, PA
Have you bled all the lines and adjusted the brakes? Just putting fluid in the resevour will not help if the lines are completely empty. The light will still stay on. Sorry I was a little vague on that one.
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Elder User
Joined: Mar 2006
Posts: 590
Likes: 1
From: Venetia, PA
If you have filled her up, bled the system and everything and are ready to go, try taking a cruise down the road. See how the brakes feel and see if the light goes out after the computer resets. You may need to remove a battery cable to let the comp reset itself too. Take the neg cable off for a minute or two, hook it back up and then take her for a spin. Tell us what happens and if its still on we will go from there.
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Postmaster
Joined: Oct 2006
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From: Davis & Newcastle, CA
I've never had to bleed my brakes but my instinct tells me no. The only time you'll need to bleed them is when you get air in the lines, if you didn't touch the front brakes then there's no air up there, no? 
Elder User
Joined: Mar 2006
Posts: 590
Likes: 1
From: Venetia, PA
If you completely drained the resevour it would be a good idea to bleed both front and back brakes. Usually you dont have too do both but in your case its probably necessary. If anything, it will clear some of the old brake fluid out of the front lines so your new fluid wont dirty as quickly.
Postmaster
Joined: Oct 2006
Posts: 4,816
Likes: 1
From: Davis & Newcastle, CA
Soak it with PB Blaster several times over the course of a couple days (depending on how urgent it is) and it should break loose pretty easy. I can't imagine the torque spec on a bleeder screw is very high...
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Senior User
Joined: Sep 2007
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I was talking to an apprentice mechanic friend and he said I may need to bleed the ABS unit? anyone know about this? how to bleed it and where it is located or is this guy talking about something I don't have?