Air Conditioning Switch: Testing and Inspection

A/C Switch and Defroster Switch in Heater Controller Inspection
- Press A/C switch (1) and check if there is continuity between terminals "a" and "b".
- Connect battery positive terminal to terminal "c" and negative terminal to terminal "a", and then press A/C switch (1) and check if indicator lamp lights.




- Turn air flow selector (2) to defroster position and check if there is continuity between "a" and "d" terminals, "e" and "f" terminals.