Camera splitter is anRVS unit. power comes to it via its red wire which is connected to a yellow wire behind the radio which goes into a wire bundle leading under the dash to the drivers side of the coach. All fuses under the dash check good as well as those on in the coach panel under the bed. Every thing else seems to work fine. I spliced into the mirror heater power with an inline fuse for safety and cameras work fine. I just want to know why I lost power to that wire.