Class C TV outlet ignition switch interlock
I put in a small 300W inverter so my wife and son could watch TV from the back seats if they wanted. Got it wired in with a Xantrex auto transfer switch so it powers the general (non-GFCI) outlets when shore/generator power aren't running. Thoroughly tested it in the driveway and everything was great... until we actually took a short trip this weekend. As soon as I started the engine the TV went dead and wouldn't power back up. I immediately assumed the cheap inverter was the culprit until I found the other outlets working fine.
I didn't realize there's an interlock on the outlet behind the TV that locks out the power when the ignition is on. Quick trip to the internet and found some vague references to pulling a fuse (but never found exactly which one) and most of the responses were to just pull the outlet, the interlock relay should be glued to the back. Well, mine wasn't like that. It was just a regular outlet with a romex feed.
I found a YouTube video of a guy with a Class C and his was in a metal junction box behind a false wall in the same cabinet. Mine didn't have any walls that looked like they could be removed without completely destroying the cabinets so I started getting nervous. I started pulling the control panels trying to follow the romex from the outlet back towards the breaker panel and using my AC voltage sniffer to check where the power went live again.
I finally pulled the microwave and found the junction box with the ignition lead and lockout relay. All you have to do is pop out the 2 pin connector and you're good to go. This is probably the same location in my 2018 Freedom Elite 24HE as its twins the Four Winds and Chateau 24F and maybe some similar years/floor plans.
Yes, the lockout exists so the driver won't be distracted while driving but the TV on its swingarm is past my line of sight anyway. Hope this saves the next person some frustration.