Operation CHARM
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Buick
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1987
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Somerset L4-151 2.5L
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Repair and Diagnosis
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Heating and Air Conditioning
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Air Door
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Air Door Actuator / Motor
Air Door Actuator / Motor
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Testing and Inspection
Initial Inspection and Diagnostic Overview
System Diagnosis
Troubleshooting Hints
Component Tests and General Diagnostics
Table 1
Table 2
Locations
Outside Air Valve Vacuum Actuator
A/C Defrost Vacuum Motor
A/C Heater Vacuum Motor
A/C Temperature Door Motor
Service and Repair
Defroster Vacuum Diaphragm Replace
Mode Vacuum Diaphragm Replace
Diagrams
Diagram Information and Instructions
Cell References
Schematic Symbols
Symbol Identification
Wire Color Code Identification
Electrical Diagrams
