03 Caravan SE with ABS brakes, disc up front drums in the rear. For a couple of days I noticed the brake pedal getting softer and softer and the brakes getting worse with the pedal going almost to the floor. At this point I only had front right and rear left brakes working.
I have gone over all the lines for a leak and a mechanic friend also looked
over the lines but no leaks found. I bled the system 4 times and could not get rid of the air in these two lines. I talked to a couple of mechanics and they thought that it was my master cylinder. So I replaced the master cylinder and bled the whole system again. It felt like I had good pressure until I started the van and then the pedal was almost to the floor again with only the front right and rear left brakes working as before.
Now I am being told it might be the ABS control!
Anyone have an idea as to what has happened to my brakes?

 

With ABS brakes, the hydralic unit for the ABS has to be bled seperately using a scan tool. You may have to bring it somewhere to have it bled.

 

Thanks for the info.