ELECTRICAL SYSTEM - continued - TM-9-2320-391-100099

TM 9-2320-391-10

M1078A1 SERIES THEORY OF OPERATION -

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Continued

ELECTRICAL SYSTEM - Continued

Main Light Switch (Vehicle S/N 18,550 to 199,999). In addition to controlling

activation of vehicle lighting systems, the main light switch provides dimming for both the

12 VDC and 24 VDC panel lighting. The main light switch also provides variable

backlighting to indicate switch position.

1. Pressing the ENTER key after a selection has been made enters the selected function.

If ENTER is not pressed within 5 seconds after the selection has been made, the

switch will reset to the previous mode to prevent accidental switching.

2. When STOP LIGHT key is selected, all vehicle lights are extinguished, but the

stoplights operate when the brake pedal is pressed.

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