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Problem with a 2005 Pontiac Montana

I have the car mentioned above (2005 Pontiac Montana). It has a DVD installed where the dome light is (it came with the car). The problem I have is that when we turn the heat or air on in the back of the mini-van, the DVD player doesn’t work. It seems like they are on the same circuit. Is there anyway that I can get it rewired so they are independent of each other or something else?

Sure there is a way but it will take a examination of the schematic. I hope this was factory installed and not Dealer installed.