Troubleshooting Hints - Blower Controls

TRY THE FOLLOWING CHECKS BEFORE DOING THE SYSTEM CHECK:
1. Check HTR-A/C Fuse by visual inspection.
2. Check Fusible Link B by visual inspection.
3. Check that grounds are clean and tight.
4. Check that the Blower Motor connectors and Blower Motor Relay are mated correctly and firmly seated.
5. If blower runs all of the time with Ignition Switch in OFF, replace the High Blower Relay.
6. If blower runs all the time with Ignition Switch in RUN, and the Mode Selector OFF replace the Mode Selector.
7. Replace the Mode Selector if the Blower Motor runs with the Ignition Switch in RUN and the Mode Selector in one but not all of the following modes: MAX, NORM, B/L, VENT, HTR and DEF.
^ Go to System Check for a guide to Normal Operation. System Check - Overall
^ Go to System Diagnosis for diagnostic tests.
^ Refer to Instrument panel, Gages And Warning Indicator for Heater and A/C Control Assembly access Information. Instrument Panel, Gauges and Warning Indicators