Power Transfer Switch

[Edsmotorhome]

I have a 1994 THOR Residency 3500. Everything works while connected to Shore Power. When I try to use the generator none of my AC devices work and I was told it worked last year. Does anyone know where the Power Transfer Switch is located? I've traced to wiring from the Generator and the Shore Power to midline on the motorhome. This is where I lose track of it. The Generator breakers are fine. Any help would be appreciated.

[Edsmotorhome]

Switch found! It was behind the Power Distribution Panel located above the Master Bed.

[saddlesore]

With an older RV do yourself a favor & spend the bucks for a good surge protector and lock box.Buy the biggest and best that you can find..
You should be able to get a good 30 amp one for $260 to $350 @ Camping World.
It could save you from replacing all the electronics including the microwave,TV's and shore to coach switch-over powerbox in your coach...
All it takes is a bad pedestal power box combined with a power spike or excess low/high voltage (don't ask how I know this)