Pressure Regulator Control Solenoid
- Unplug vacuum hose from pressure regulator control solenoid. Blow through solenoid from port "A". Ensure air flows through port "B". See Fig 1 .
- Unplug solenoid valve connector. Connect 12 volts and ground to solenoid terminals. Blow through solenoid from port "A". Air should exhaust through valve air filter. Replace solenoid valve if it does not pass test.