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Audio Unit C2253a

Fig 1: Identifying Audio Unit C2253A Connector Terminals
G03203287Courtesy of FORD MOTOR CO.
C2253A CONNECTOR REFERENCE CHART

Pin Number(s) Circuit Designation/Description Normal Condition/Measurement
1 29-MD15 (OG/BK) keep alive power feed Greater than 10.5 volts with key ON or OFF.
2 10-MD15 (GY/OG) B+ voltage feed in ON/ACC position Greater than 10.5 volts with the key in ON or ACC.
13 31-MD15B (BK/GN) audio unit ground Less than 5 ohms to ground.
24 31-MD15A (BK/GN) audio unit ground Less than 5 ohms to ground.
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