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Auxiliary A/C Relay

Fig 1: Identifying Auxiliary A/C Relay Connector Pinouts
G03859384Courtesy of FORD MOTOR CO.
AUXILIARY A/C RELAY CONNECTOR PINOUTS REFERENCE

Pin Number(s) Circuit Designation/Description Normal Condition/Measurement
30 CKT 181 (BN/OG) voltage at all times Greater than 10 volts at all times.
85 CKT 1205 (BK) ground Resistance of 0 ohms to chassis ground.
86 CKT 575 (YE/BK) auxiliary blower motor relay control Greater than 10 volts with the ignition on.
87 CKT 371 (PK/WH) auxiliary blower motor relay switched output Less than 100 ohms to chassis ground with the front auxiliary controls in the rear position and the rear auxiliary blower control in HI.
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