Voltage is applied through circuit breaker Number  22 to the heated mirror switch when the ignition switch is in RUN position. When the switch is pressed, the switch closes, allowing voltage to be applied to the left side heated mirror, the right side heated mirror, and the heated mirror switch indicator. Since both of the heated mirrors are separately permanently grounded at G105, the heater element begins to warm. Since the indicator is permanently grounded through the joint connector Number 1, the indicator will light. The heaters and indicator will remain energized until either the ignition switch is turned out of the RUN position or the heated mirror switch is moved to the OFF position.