Important Safety Notice

Appropriate repair methods and procedures are essential for the safe, reliable operation of all motor vehicles, as well as the personal safety of the individual doing the work. This article provides general directions for repairing vehicles with tested, effective techniques. Following them will help ensure reliability. There are numerous variations in procedures, techniques, tools, and parts for repairing vehicles, as well as in the skill of the individual doing the work. This article cannot possibly anticipate all such variations and provide advice or cautions as to each. Accordingly, anyone who departs from the instructions provided in this article must first establish that they compromise neither their personal safety nor the vehicle integrity by their choice of methods, tools, or parts.

This pinpoint test is intended to diagnose the following:

• Harness circuits: battery positive voltage (B+), vehicle power (VPWR), air conditioning clutch (A/CC), air conditioning clutch power (A/CC PWR), A/CLPCS, A/CHPSW, air conditioning cycling switch (A/CCS).
• Powertrain control module (PCM) (12A650).

Fig 1: Identifying Air Conditioning Clutch (A/CC) Relay Connector Terminal

Courtesy of FORD MOTOR CO.

Fig 2: Identifying Air Conditioning High Pressure Switch (A/CHPSW) Connector Terminal

Courtesy of FORD MOTOR CO.

Fig 3: Identifying Air Conditioning Refrigerant Distribution Valve (A/CRDV) Solenoid Connector Terminal

Courtesy of FORD MOTOR CO.

Fig 4: Identifying Powertrain Control Module (PCM) Connector Terminal

Courtesy of FORD MOTOR CO.