Trudy -
My immediate guess is that the Bargman connector is wired wrong. In the connector, there is one wire for the left turn signal, another for the right turn signal, and yet another for the exterior body lights. I'm betting that the last two wires are reversed at the Bargman connector. Easiest way to confirm or deny is with a 12-volt test light. Disconnect the TM, and check the wiring against this diagram. A test light costs a couple bucks at any hardware store, big box store, or even WalMart. Easy to use, and completely non-dangerous.
http://www.trailmanorowners.com/foru...&pictureid=442
If the Bargman checks out OK, then you could have the same wiring error, but farther downstream. Take off the lower panel outside the refrigerator, and peer into the nest of wires. If you are not electrically inclined, this can look pretty daunting, but if you look around at floor level, you will see the big black cable coming up out of the floor. This is where the seven wires from the Bargman break out separately and go to their final destinations. If you have an electrically-inclined relative or friend, it should be pretty simple to compare the wires you see with the physical wiring diagram in the TM Owner's Manual. I don't have a manual for a 2922, but I bet the page in question is simlar to page 36 in the 2008 manual seen here
http://www.trailmanorowners.com/foru...ad.php?t=13839.
If you have a manual specific to your trailer, use it instead.
BTW, this query should be in the Electrical section. I will move it in a couple days, and since you are not a Sponsor, you will lose access to it.
Bill