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Negative Switched Dome Lighting
Red / Black – Lamp on
Black / Red – Lamp common
Violet / Brown – Lamp Auto
Factory Door ajar
switch or Body
To 3 pin
connector
To
constant
To
constant
For negative systems, connect the violet / brown (Lamp auto) wire to the vehicle's
switched wire. Then connect the red / black (lamp on) wire to a good ground and the
black / red (lamp common) wire to fused constant 12 volt source. Negative systems
are commonly found on General Motors and import vehicles.
Note: Some vehicles which incorporate transistorized control of the dome light
circuit, such as the 1999 Dodge Caravan, may require that the violet / brown (Lamp
auto) wire be connected to the door pin switch wire, as the additional current draw of
the Monitor's lights may not be supported by the output of the vehicles body control
computer.
Positive Switched Dome Lighting
To 3 pin
connector
on Monitor
Factory Dome Light Circuit
To
constant
+12vdc
Red / Black – Lamp on
Black / Red – Lamp common
Violet / Brown – Lamp Auto
To
constant
+12vdc
Factory Door ajar
switch or Body
Control computer