The drum lamp is an LED array. It comes on when the POWER button is pressed and goes off when the door is locked at the beginning of a cycle. It can be turned on during washer operation by pressing and holding the RINSE+SPIN button for three seconds; it will turn itself off again after 4 minutes. It also turns on at the end of any cycle and extinguishes four minutes later. (NOTE: The button that operates the lamp may vary by model but is marked on the control panel of each machine.)

Testing between pin 1 or pin 3 and chassis ground at the lamp connector when the lamp should read approximately 16.5 V_DC whether the lamp is on of off. When the microprocessor switches the lamp on, the current is passed to ground through a resistor, effectively dropping the voltage at the lamp to 6.5 V_DC.

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