Owner's Manual

Connecting the Dome Lights

The dome lights in the video monitor require three connections to the vehicle’s wiring.

There are two common types of dome light circuits used, positive switched systems or

negative switched systems. Positive switched systems supply voltage to the interior lights

to turn ON; negative switched systems apply ground to illuminate the bulbs.

To determine which system you have to locate the wires at the dome light:

t On a positive switched system, with all the doors closed and the lights out, both wires

at the dome light will rest at ground. When the light is activated, one of these wires

will switch to +12 VDC. This is the vehicle’s switching wire Lamp auto.

t On a negative switched system, with all the doors closed and the lights out, both

wires at the dome light will rest at +12 VDC. When the light is activated, one of these

wires will switch to ground. This is the vehicle’s switching wire Lamp auto.

For positive switched systems, connect the Purple / Brown (Lamp Auto) wire to the vehicle’s

switched wire. Then connect the Red / Black (Lamp ON) wire to a fused constant 12 volt

source and the Black / Red (Lamp Common) wire to a good ground. Positive switched

systems are commonly found on Ford vehicles.

For negative switched systems, connect the Purple / 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 a fused constant 12 volt source. Negative

switched systems are commonly found on General Motors and import vehicles.

NOTE: Some vehicles which incorporate transistorized control of the dome light circuit,

may require that the Purple / 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 vehicle’s body control computer.

After wiring the dome lights make sure the dome lights operate properly with doors

opening and closing and that they are not always on. Do not leave the dome lamp

switch on the DVD overhead in ON position as this will drain the battery over time.