Troubleshooting Hints - Blower Controls

PERFORM BEFORE BEGINNING SYSTEM DIAGNOSIS
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 Relay.
3. Check Fuse 24 if the Blower Motor is inoperative. If open, check for short to ground though CKT 41
^ Check for a broken (or partially broken) wire inside of the insulation which could cause system malfunction but prove "GOOD" in a continuity/voltage check with a system disconnected. These circuits may be intermittent or resistive when loaded, and if possible, should be checked by monitoring for a voltage drop with the system operational (under load).
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (refer to General Troubleshooting Procedures). Diagnostic Aids
^ Refer to System Diagnosis. System Diagnosis