Fix the powermaster. The system has gotten a lot of bad raps, but they work great for turbo cars. First check your fuse.They blow easily,especially after setting for a while.If fuse is ok,.Check your pressure switch,most likely that is it . When you hit your brakes with switch on, you should hear the motor kick on to power up the brakes. Try performing the hammer test. Lightly tap on the components to see if anything is stuck.