Troubleshooting Hints - RPO C67

1. If the HVAC Control Assembly is completely inoperative, check for poor connections at HVAC Control Assembly Connector C1.
2. Check for missing or damaged connector seals at the Blower Motor Resistor and Blower Motor High Speed Relay.
3. Check HVAC Fuse if the Blower Motor is inoperative. If open, check for short to ground though CKT 50.

^ 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.