I just finished installing a Tadi Bros 90117 setup on our Impact 359. Same issue rubber plug + Yellow & White wire. Local dealer had no clue & did not bother w/ Keystone. Yellow wire only has power when backup lights are on. White is ground. I tapped off the marker light circuit (Green wire on our rig) because I want the ability to have the camera on all the time for passing, monitoring the rear, etc. So this wire has power any time the vehicle lights are on. Not sure why keystone would not prep it this way from the start or at least give us the option...JM2C
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