I bought a 1999 oldsmobile silhouette replaced brake pads and bled brake system . the brakes are still spongie abs light still comes on once in awhile..

The ABS light is on because there is a fault in the abs system, The traction control uses the abs system so it will also not work if the abs is not working. You'll need to scan the ABS module to see what code is stored in its memory. Once you have the code you'll have a better idea of what needs to be repaired.

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U need the special anti-lock brake (ABS) bleeder adapter to get the air out of the ABS hydraulic control unit, that is why the spongy feel the system is no completely bled of air unless you hook up the tool that holds the hydraulic control valves open for bleeding

check the abs sensors common to hit or damage the wiring or knock connection loose when doing a brake job the traction control system[tcs] is tied into the abs system

Hi,
You will have to check each brake caliper for pressure when the brake pedal is applied. You may have a sticking piston in one of the brake calipers.

This will cause a spongy pedal.

Hope this helps,let me know how you get on.

Thanks
Jason

Did you adjust the rear shoes out? If the rear drum brakes are out of adjustment they will give you a lot of pedal travel. If the pads are worn have no fear of that U-CLIP brake spring, just change one shoe at a time. Take the spring off one side, change the shoe, put the spring back on the post and do the same to the other shoe, no problem.

I just went to Brake Masters this morning and had them replace the Master Cylinder since I was experiencing the pedal very spongy and going to the floor. When they replaced the Master Cylinder and they gave me back the car, the brakes were still spongy and going to the floor. I addressed this to them and they took another look at it, but when I took it for a second time, the brakes were extremely spongy. It was almost like they gave me back my car in worst condition to when I brought it in. Can you help?

sounds to me like the abs relay is bad maybe $75 repair at the dealer

Have you had anyone try to clean and adjust the rear brakes? You will need a shop to scan the van for ABS codes first to cure the ABS light.

have you check? the master cylinder. sometine when you get the rotors cut they dont come out right because they may be warped or to thin. if you did the job yourself you might have put the calipers in on the wrong side. this happens alot . if your rotors front and rear are fine then switch the calipers to the other side.

I have had the parts stores give me the wrong pads for these before but also these have a little *** or bump on the back of the pad. this bump has to be in the right position or it can cause the caliper/piston not to seat properly. you may have to disassemble and look carefully for this problem. sometimes the caliper won't sit flat on the pad on the outside because of that little ***. also it can be under the piston. just get rid of the *** if you see it and reassemble. make sure you bleed from all the bleeders not at the closest line that comes free.