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. See Fig 1 . Blow through solenoid from port A. Air should exhaust through the valve air filter. Replace solenoid valve if it does not pass test.