Alpine PKG-RSE3HDMI Guide D'installation page 6

Dome Light Wire (Green)
The dome light wire connects the built-in dome light to
the cable from the vehicle's dome light Switch.
Polarity change switch is located on the top surface
that mounts into the headliner.
Vehicle door polarity depends on the vehicle type. The
polarity can be changed by the "Door SW polarity"
switch. (Default: Negative Switched System)
Polarity +: When door open, door signal is 12V
Polarity -: When door open, door signal is GND
Polarity+
When the door is open ->
the door signal is 12
Vehicle
Vehicle Door SW
Door Closed
Door Open
Polarity-
When the door is open ->
the door signal is GND
Vehicle
Vehicle Door SW
Door Closed
GND
Door Open
6
-EN
FUSE (5A)
1) BATT (Yellow)
2) ACC (Red)
Door
3) GND (Black)
4) DOOR (Green)
FUSE (5A)
1) BATT (Yellow)
2) ACC (Red)
Door
3) GND (Black)
4) DOOR (Green)