Troubleshooting Hints - Blower Controls

Perform before beginning System Diagnosis
1. If the Blower Motor does not operate, check Fuse 8 by visual inspection.
2. If the Blower Motor does not operate, check that ground G101 is clean and tight.
3. If the Blower Motor runs all of the time with the Ignition Switch in "OFF", replace the Blower Motor Relay.
4. If the Blower Motor runs with the Ignition Switch in "RUN" and Mode Selector in "OFF", replace the Mode Selector.
5. Replace the Mode Selector if the Blower Motor runs with the Mode Ignition Switch in "RUN" and the Selector in one but not all of the following modes: "MAX, "NORM", "B/L", "VENT" "BLEND", "HTR" and "DEF".
^ Refer to Blower Motor for Blower Motor access. Blower Motor
^ Refer to Blower Motor for Heater and A/C Control Assembly access. Blower Motor
^ 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 (Refer to "Diagnostic Aids/General Troubleshooting Procedures,") Diagnostic Aids
^ Check for proper installation of aftermarket electronic equipment which may affect the integrity of other systems (Refer to "Diagnostic Aids/General Troubleshooting Procedures,") Diagnostic Aids
^ Refer to System Diagnosis. Initial Inspection and Diagnostic Overview