Wrangler L4-2.5L VIN P (1999)
Air Door Actuator / Motor: All Technical Service Bulletins
Heater & A/C - Will Not Switch To Panel Mode
NUMBER: 24-12-99
GROUP: Heating & A/C
DATE: July 2, 1999
SUBJECT:
The Heating and A/C System will not switch to the instrument panel outlet mode.
OVERVIEW:
This bulletin involves installing a panel/demist door vacuum actuator.
MODELS:
1999 (TJ) Wrangler
1999 (XJ) Cherokee
SYMPTOM/CONDITION:
The heating and NC system may not switch to the panel mode. This could be caused by a leaking diaphragm in the panel/demist door vacuum actuator.
This symptom could be intermittent and system could switch back and forth from the panel mode while driving.
DIAGNOSIS:
Apply vacuum to the panel/demist door actuator using a hand actuated vacuum pump containing a vacuum gauge. The actuator should hold vacuum
indefinitely. If the vacuum bleeds off, the diaphragm is leaking. Perform the Repair Procedure.
PARTS REQUIRED:
1
04864995
Panel/demist Door Vacuum Actuator
REPAIR PROCEDURE:
THIS REPAIR IS COMPATIBLE WITH DAIMLERCHRYSLER'S MOBILE SERVICE PROGRAM AND DOES NOT REQUIRE HOISTS OR
OTHER FULL SERVICE FACILITY SPECIAL EQUIPMENT.
1.
Disconnect and isolate the negative battery cable.
2.
Remove the knee blocker from the instrument panel.
3.
Unplug the vacuum line from the actuator (See Figure 1).
