Heat/Def & Vent/Def Solenoids

Fig. 15 Heat/Def & Vent/Def solenoid test.:

1. Using ohmmeter, check for continuity between solenoid terminals, Fig. 15. Meter should indicate continuity between each pairing of terminals.
2. Connect diaphragm capsule and apply vacuum to solenoid as shown in Fig. 15. No vacuum should be transmitted through solenoid
3. Connect battery positive terminal to black wire terminal on solenoid and connect battery negative terminal to solenoid green wire terminal. Diaphragm arm should retract and hold position.
4. Disconnect jumper wire from solenoid green wire terminal. Diaphragm arm should hold in retracted position.
5. Connect jumper from battery negative terminal to solenoid yellow wire terminal. Solenoid should vent trapped vacuum and diaphragm arm should extend.
6. If solenoid fails to operate as outlined, solenoid is defective.