No they dont work
you have a pad not backing off from the disc ... its not right
going forward
if going direct master to caliper restores normal operation
that would suggest the ABS unit is having an influence
if not you need to eliminate
master cylinder
Brake line
Caliper
You need to think about how the circuit works
Master cylinder - ABS unit - caliper not master cylinder - caliper & add ABS when needed
The ABS unit is monitoring the rotation speeds of the wheels constantly A) for ABS & B) to provide your road speed in the Kombi
if the ABS unit detects lock up when braking it modulates the brake pressure to give cadence braking on/off/on/off/on/off very rapidly to slow you and give steering control
So as long as you have your brake applied enough to trigger the ABS module - its doing the braking not you
once you come off the brakes, and wheel rotation is restored the ABS stops modulation
so if you have an internal fault in the ABS unit the pressure might not be released enough, and the symptom of a sticky caliper
Thats similar to what had on the front, we initially thought sticky caliper
6 months later - it was the ABS unit gone south
As i said
Eliminate the other parts
Rear master cylinder
rear brake line
rear caliper
if one of those clears the fault
job done, i was wrong if not, it can only be the ABS unit
One thing you havn't mentioned ,or if you did i missed it
What year of bike hexhead or twincam
mileage
service history (brake fluid changes)
