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thank you ! for several years, I was missing 1 of the 2 circuits from the inverter. There are two receptacles on the back of the inverter, both  were producing power, From there two portable cords go into the great unknown in this wall. I never heard the relay work, with the noise from the transfer switch being louder. I don't understand why it was behind a false wall in the closet, but I am pretty sure I will find 1 leg of this relay is non op ,,, 

No problem, let us know what you find out. On the Wanderlodge it was much easier to figure out because they just had a jumper wire from the park/generator power directly to the coil, so it was easy to tell that any time the park power was on it would energize the relay. Yours has that mysterious orange wire that you would need to figure out where it goes to see what is controlling this relay.