How do you bleed rear ABS brakes? A rear wheel cylinder was changed to stop a fluid leak. After bleeding (and since I bought the vehicle) the brake pedal will "fade" to the floor while running. While not running the brake feels good. The Master cylinder was changed, figuring that was the problem. Alas it did not help. At this point it seems there is air in the abs system. Does that make sense and how do you bleed the rear ABS.

 

Push one end of the tube over the brake bleeder bolt at the right rear of the car. Put the other end of the tube into a small, clear bottle with an inch or two of clean brake fluid in it. (This will keep air from being sucked back into the brake cylinder or caliper.) for more detail Bleeding ABS Brake Systems go with this link maybe this helps you !!

 

Thanks. I used a bleeder ball machine.There is defiantly no air in the system.

 

Most of the time when the pedal sinks to the floor , it's because the master cyl is leaking internally. Unfortunately , there are problems with replacement master cyls and just because they are "new" doesn't mean they are good. Depending on where you purchased it could be reason to suspect it's integrity.

If in the process of replacing the wheel cyl the fluid in the line was allowed to leak out , there could still be air in the line. Sometimes it can take quite a bit of fluid to get all the air out.

 

No air 100%. Going to put the brake gauges on the wheel cylinder and cali[per bleeder ports tomorrow morning just to see what readings I get. The gauges have a memory limit dial. Thanks

 

Thanks for the update, counting on the info you find.