Heater Control Assembly

INSPECTION







1. INSPECT BLOWER SPEED CONTROL SWITCH CONTINUITY
If continuity is not as specified, replace the switch and check the bulb.




2. INSPECT DEF. MODE SWITCH
a. Check the continuity exists between terminals 1 and 3 of the blower switch connector when turning the mode selector to the DEF. position and F/DEF. position.
If no continuity exists, proceed to the next step.




b. Check the continuity exists between the terminals of the A/C mode switch.
If no continuity exists, replace the A/C mode switch.
If continuity exists, check or replace the heater control housing base.