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
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| Red / Black – Lamp on |
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To 3 pin |
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| Black / Red – Lamp common |
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connector |
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| Violet / Brown – Lamp Auto |
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on Monitor |
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Factory Dome Light Circuit
To
constant
+12vdc
Factory Door ajar
switch or Body
Control computer
To
constant
+12vdc
Negative Switched Dome Lighting
To 3 pin
connector
Red / Black – Lamp on
Black / Red – Lamp common
Violet / Brown – Lamp Auto
To
constant
To
constant
Factory Door ajar
switch or Body
7
