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Depends on your factory harness. I bought a harness which allowed me to plug my existing backup camera into video in on the back of this unit. There are two other wires that you connect to your factory harness that detects reverse and the parking brake. If you do not buy a harness, you have to deal with finding the schematics for your car and find the wires on your own. You might also need a step down from 12v to 6v for the camera to work.
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