Troubleshooting Hints - Without A/C

1. If the Heater Control Assembly is completely inoperative, check for poor connections at Heater Control Assembly Connector C2.
2. Check for missing or damaged connector seals at the Blower Motor Resistor and Blower Motor High Speed Relay.
3. Check HTR-A/C Fuse if the Blower Motor is inoperative. If open, check for short to ground through CKT 50.
4. Check for vacuum supply to the Solenoid Box
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system failure but prove "GOOD" in a continuity/voltage check.
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.
^ Refer to System Check. for System Diagnosis. System Check - Without A/C