I tried IKA dual relay config and works fine. In my case I am looking to wire in a manual switch where I can activate the rear view camera manually in order to view rear camper.

Does anyone know how I can make this happen? Currently wiring 1-pole to Chassis Ground and other to pin 17 on TV Tuner to force camera switch over. Problem is that it will not get power since this wiring is for reverse signal powering.

Just not sure how I could get switched power in this scenario without getting diodes etc.

Any insight is greatly appreciated