ALB diagnosis help

[asylum]

So my "brake lamp" comes on, then the brake warning light after some seconds and finally the ALB warning light after some more seconds. No more ALB on all 4 wheels. Brake fluid is ok on both tank.

What I plan to do :

- check all fuses concerning brakes.
- try to activate the ALB pump by bridging the relay (if it doesn't pump, then it is the ALB pump).
- release pressure in the system with the T wrench tool and hear if the pump activate when starting the car (if it doesn't, it is the relay).
- check the solenoids... but my ALB isn't working on all 4 wheels. A stuck or wrong solenoid would only affect one wheel, wouldn't it ?

What else to do or think about ?

Thanks for your help.

 

[Larry Bastanza]

Do you hear it running for about 2 minutes when you first start the car?

 

[asylum]

I was at a trackday. No problem in the morning. It happened in the afternoon. And to say I didn't hear the ALB pump working any more...

The motor can be replaced or it is a $$$ whole pump assembly ?