Switching Solenoid Valve
- Disconnect vacuum sensing tubes from switching solenoid valve and vacuum pipe. Blow through switching valve from vacuum sensing tube "B". See Figure . Air should pass through valve and escape from port "C".
- Disconnect electrical connector from switching solenoid valve and connect battery power to terminals on valve. Blow through hose again. Air should pass through valve and escape through port "A" of the valve. If valve does not respond as described, replace switching solenoid valve.