I am at a loss! I have a 95 Chevy Silverado 1/2 ton pick-up. When I bought it from a buddy of mine he told me the abs light stayed on all the time. I decided to bleed the brakes but that didn't fix the problem. Approximately 6 weeks ago the brake light came on and stayed on. I checked the pads and shoes and they are still good. Last night I almost couldn't stop at the red light. Any last things I can check before I take it to the shop?
2007-07-30 02:47:24 · 7 answers · asked by Scott H 2 in Cars & Transportation ➔ Maintenance & Repairs
If you bled the breaks, make sure that you do not have any air in the brake system. When you bleed them you should see little bubbles come out. When they stop coming out you are done bleeding the brakes. The fluid does not compress the same when air is in the system and can cause problems with breaking. Check that first if you can.
After that, it is probably the centeral abs control module, not just a speed sensor.
Good luck!
2007-07-30 02:54:06 · answer #1 · answered by crazy_fuzzy_bunny 5 · 0⤊ 0⤋
You might have a leaky caliper or master cylinder - do you see any fluid leaking out?
Otherwise you might still have air in the lines - make sure they are bled properly - which requires two people, both have to know what they are doing.
All four wheel cylinders (whether they are drums or discs) have to be bled. Start by topping off the master cylinder and putting the cover on.
I generally just jack the whole car up off the ground and put it on jack stands, take all four wheels off.
Start with the drivers side front brake, then front passenger side, drivers side rear, and finally passenger side rear (normally this does the shortest lines first, and the longest one last).
Locate the bleeder screw, and loosen it - have the other person slowly press down on the brake. Use a catchpan or something to catch the fluid (it will squirt out a ways, so be ready). Once the pedal is all the way down - tighten the bleeder screw, and have them let up on the pedal -- ::IMPORTANT:: if they let up on the pedal before you tighten the screw, air gets sucked back into the line, making the whole process a waste of time (which is why both people have to be on top of it).
Do this a few times, and then move on to the next one in the order I described above, until each one has been done. Chances are there is still air in at least one - if not more than one of the lines unless you already followed this process correctly, in which case you most likley have a bad master cylinder, or other component.
I would avoid driving the vehicle until you get this problem fixed.
(edit: the ABS module might be causing problems too - have it checked out if proper bleeding doesn't fix the problem).
2007-07-30 02:58:41 · answer #2 · answered by Anonymous · 0⤊ 1⤋
Bleed the brakes again. You likely still have air in the system. There is an order in which you are supposed to bleed them; call AutoZone or the dealer to find out which wheel to do first, which next, etc. Make sure your brake fluid reservoir is full. Sometimes a low level will cause the ABS light to come on, and it would certainly cause air to get into the system.
If bleeding does not fix it, ask at AutoZone if they can scan the ABS computer. There may be a problem you can fix, but please be careful. Brakes are not something to be worked on by those who know nothing about them.
2007-07-30 02:59:52 · answer #3 · answered by J.R. 6 · 0⤊ 1⤋
Did you bleed the brakes properly?? The correct procedure for bleeding the brakes on most RWD vehicles is to start at the furthest wheel. Do the right rear then left rear brake, followed by the right front and left front brakes. On a FWD vehicle with a diagonally-split brake system, do the right rear then left front brake, followed by the left rear and right front brake. if that was done right then I would check the master cylinder for leaks and also the wheel cylinders.
2007-07-30 03:05:51 · answer #4 · answered by bmw575se 2 · 0⤊ 0⤋
Check that the Master Cylinder is operating correctly. Press the brake pedal until there is resistance. Slightly let off the pressure & depress again. The pedal should come up hard in the same spot. If you can work the pedal to the floor, then the Master Cylinder is shot.
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2007-07-30 02:57:26 · answer #5 · answered by Mr. T 7 · 1⤊ 0⤋
Sounds like the ABS module has gone south on you.
2007-07-30 02:53:41 · answer #6 · answered by Motorpsycho 4 · 0⤊ 1⤋
could still have air in line or master cylinder bad. look on firewall see if any fluid is leaking
2007-07-30 02:59:49 · answer #7 · answered by rex b 2 · 0⤊ 0⤋