Troubleshooting Hints - Blower Controls

PERFORM THESE STEPS FIRST

1. If the Heater and A/C Control Assembly is completely inoperative, check for poor connections at Heater and A/C 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 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 at the Solenoid Box.

5. 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.

6. Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems.