Normally Open (Type 2) Solenoid Vacuum Valve

A type 2 solenoid vacuum valve is used in conjunction with a type 2 air cleaner temperature switch.
1. Start engine and allow to reach normal operating temperature. Make sure that ambient air around air cleaner is above 65° F.
2. With engine idling, disconnect vacuum hose to thermactor air bypass valve. Thermactor air should exhaust to atmosphere through exhaust ports in end of valve silencer cover. Reconnect vacuum hose. Vacuum hose must be connected to black input nozzle on solenoid valve.
3. Disconnect wiring to solenoid valve and determine which wire has 12 volts when ignition switch is in the run position. Use a test light; connect one end to wire and other end to ground.
4. Connect wire power supply wire to solenoid vacuum valve, then with engine at normal idle, ground other exposed terminal on solenoid vacuum valve to ground. Thermactor air should be exhausted to atmosphere.
5. Reconnect other wire to solenoid vacuum valve. Thermactor air should not be dumped to atmosphere.
6. Replace solenoid vacuum valve if operation is not as specified in steps 4 and 5.