In my prtevious post I mentioned that I have intermited ABS issues. Well I have replaced the relays and I still have the anti barke light and Brake light come on once in a while, actualy everyday. I dirrect current the pump to test and it is ok, but what ever tells the pump to kick in or off is not working. with the relay not being the issue could it be the presure switch? how can this be tested? need help!!!!! thanks

 

Most common failure for the switch is leaking. I don't know if I've ever seen on fail by function. My guess would be the accumulator ball.