Does anyone know where the proper place is to grab power for auxiliary equipment on a 22 Yukon? I had an aftermarket RSE installed but where they are currently getting power is somehow causing the units to power off when the door is shut. It is the strangest thing, it took me a while to figure out what was causing them to power off. If I power them up with the door shut they are fine, but if I power them on with the door open, then shut the door, they power off. I have no idea where what where they are currently getting power.