Troubleshooting Hints - Blower Controls

1. If the Heater and A/C Control Head is completely inoperative, check for an open in CKT 50 to the Heater and A/C Control Head. Also check for poor connections at Heater and A/C Control Head Connector C1 terminal "A1" and terminal "C12".
2. Check for missing or damaged connector seals at the Blower Motor Resistors, and High Blower Relay.
3. Check A/C Clutch Fuse if Blower motor is inoperative.

^ 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.