Possible Causes
- REAR A/C - HEATER CONTROL
- 5 VOLT SUPPLY CIRCUIT SHORTED TO SENSOR RETURN CIRCUIT
- 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
- REAR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
- REAR TEMPERATURE SENSOR SIGNAL CKT SHORTED TO SENSOR RETURN CKT
- 5 VOLT SUPPLY CIRCUIT OPEN
- A/C - HEATER CONTROL MODULE