Audiovox MMD70 installation manual Connecting the Dome Lights

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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 or negative switched. Positive systems supply voltage to the interior lights to turn them on, negative switched systems apply ground to illuminate the bulbs. To determine which system you have you must 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 +12V DC. This is the vehicle's switching wire. On a negative switched system, with all the doors closed and the lights out, both wires at the dome light will rest at + 12V DC. When the light is activated, one of these wires will switch to ground. This is the switching wire.

For positive systems, connect the violet / 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 systems are commonly found on Ford vehicles.

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 con- stant 12 volt source. Negative systems are commonly found on Gen- eral 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.

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Contents MMD70 Page Important Notice Introduction InstallationContents Installation and Powering Tools Required General Installation Approach Vehicle Preparation Mounting the MMD70 MMD70 Connecting the Dome Lights Positive Switched Dome lighting Negative Switched Dome lightingControls, Indicators, and Connectors Loading and Playing a Disc Remote Control View Refer to FigureRepeat Basic OperationDisplay Mode Picture 1 Display ModeAudio ‘Angle’ in Display Mode ‘Angle’ DisplayAngle Subtitle‘Repeat’ Display ‘Zoom’ in Display Mode ‘Zoom’ DisplayZoom RepeatDisplay in Playing CD Playing Audio CDS‘MENU Screen’ Display Using the Repeat FeaturePlaying MP3 Discs Playing a Jpeg File ‘OSD Menu’ Display Menu SetupMain ‘SETUP’ Menu Screen ‘Language’ Display Menu‘DISC Menu’ Display ‘Subtitle’ Display‘Audio’ Display ‘TV Display’ Display ‘Video’ Display‘Angle Mark’ Display ‘TV Type’ Display‘Screen Saver’ Display ‘Last Memory’ Display‘Rating’ Display Playing a Video Game Refer to Figure Wired Headphones and Wireless headphones Refer to FigurePicture, but no sound SpecificationTroubleshooting Power but no video or soundMonth Limited Warranty