Testing and Inspection of Air Conditioning Switch for Aerio L4-20L (2002)
Air Conditioning Switch: Testing and Inspection
A/C Switch and Defroster Switch in Heater Controller Inspection
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Press A/C switch (1) and check if there is continuity between terminals "a" and "b".
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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.
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Turn air flow selector (2) to defroster position and check if there is continuity between "a" and "d" terminals, "e" and "f" terminals.