Voxx Movies2Go MTG10UHD, Installation Manual

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14
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:
• 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.
• 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.