Air Conditioning Switch: Testing and Inspection

COMBINATION SWITCH ASSEMBLY
a. Inspect switch continuity.
Check the continuity between terminals while switch is pressed, as shown in the chart.
If continuity is not as specified, replace the cooler switch.
b. Inspect illumination operation.
Connect the positive (+) lead from the battery to terminal 4 and negative (-) lead to terminal 3 then check that the illuminations light up.
If operation is not as specified, replace the cooler switch.
c. Inspect indicator operation.
1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1.
2. Push the A/C button in and then check that the indicator lights up.
If operation is not as specified, replace the cooler switch.
d. Inspect dimming operation
1. Connect the positive (+) lead from the battery to terminal 2 and the negative (-) lead to terminal 1 while press the switch.
2. Connect the positive (+) lead from battery to terminal 4 and then check that the indicator dims.
If operation is not as specified, replace the cooler switch.