Windshield Defroster

NOTE: The heater air plenum chamber on vehicles with rear passenger A/C registers will have an additional vacuum control motor connected to a supplemental A/C damper door. Procedures for servicing the supplemental A/C damper door are the same as for the windshield defroster door.

REMOVAL
1. Remove heater air plenum chamber.
2. Remove two retaining screws and A/C plenum demister adapter from heater air plenum chamber.
3. Remove two screws retaining windshield defroster door vacuum control motor or supplemental A/C damper door vacuum control motor to heater air plenum chamber.







4. Rotate vacuum control motor and disengage arm from pivot shaft.

NOTE: Do not attempt to bend any part of the pivot shaft. It is brittle and will break.

5. Remove any retaining screws if present from around flange joint of heater air plenum chamber.
6. With side cutters (or equivalent), cut all snap loops around flange joint of heater air plenum chamber and separate valves of heater air plenum chamber.







7. Gently depress locking ramp and remove pivot shaft from windshield defroster door or supplemental A/C damper door end and remove door(s).

INSTALLATION
1. Position windshield defroster door or supplemental A/C damper door between halves of heater air plenum chamber and install retaining screws around flange joint of heater air plenum chamber.
2. Install pivot shaft to windshield defroster door or supplemental A/C damper door end.
3. Engage arm of vacuum control motor onto pivot shaft and rotate vacuum control motor to its mounting location.

NOTE: Do not attempt to bend any part of the pivot shaft. It is brittle and will break.

4. Install vacuum control motor to heater air plenum chamber with two retaining screws.
5. Install A/C plenum demister adapter to heater air plenum chamber with two retaining screws.
6. Install heater air plenum chamber.