Front Seat Interior/Map Light Unit
The overhead front seat interior light unit contains a single main interior light. The light is controlled by the GM automatically or by momentarily pressing interior light switch located on the light assembly.
The switch provides a momentary ground signal that the GM recognizes as a request to either turn the light on (if off) or turn the light off (if on).
If the switch is held for more than 3 seconds, the GM interprets the continuous ground signal as a request to turn the interior light circuit off for the Workshop Mode.
The workshop mode is stored in memory and will not come back on even if the GM is removed from it's power supply and reconnected. The switch must be pressed to turn the lights back on.
There are two reading/map lights also located in the assembly. Each map light is mechanically controlled by depressing the corresponding on/off switch. The power supply for the map lights is supplied by the GM through the Consumer Cut Off circuit.