Wagon

1. Disconnect vacuum hose between No. 1 water thermo valve and three-way solenoid valve at thermo valve.
2. Disconnect other vacuum hose from No. 2 three-way solenoid valve.
3. Disconnect and ground green wire from No. 2 three-way solenoid valve.
4. Turn ignition switch on.
5. Blow through vacuum hose still connected to valve and ensure air flows from open port.
6. Turn ignition switch off.
7. Blow through vacuum hose still connected to valve and ensure air flows from air filter of valve.
8. If test results are unsatisfactory, replace valve.