My old 1999 P38, which I sold keeps burning up ABS pumps. I believe this is the 5th pump its burned up in the past year. Something is causing it to stick on. The ABS pumps have all been BRAND NEW pump/accumulator/switch assemblys. We have replaced the relays a couple times, put in a new fuse box and changed out the brake booster....same results.
We did however find that the guys who installed the aftermarket navigation system tapped in to the ABS harness near the computer to get the speed pulse signal. We removed that wire but this issue happened once again. We are 100% stumped at this point. Yes the brakes are being bled properly (no air bubble noises, etc) and yes the fluid has been completely flushed to ensure it is not contaminated. The first pump was replaced about 8 months ago and it lasted about 3 months with no problems. The second one was replaced and that lasted about 1 or 2 months, the third one lasted only a week, and the 4th only a day, the 5th one now only lasted about 30 minutes.
This is becoming very frustrating, inconvenient and extremely expensive! Anyone with any ideas PLEASE chime in! Thanks VERY much!