No offense taken. That was the first thing I noticed and I still had a link to a page someone put together about installation of these mirrors here.
Dodge Ram - Towing Mirror Upgrade Information- '94 to '06
I re-routed the wire and was pretty sure that I had it in a place where it would not get pinched but I decided, before I tightened anything, to plug it in and check it. That is when I discovered the problem. It is mechanical, not electrical. It tried to move. When I lightly pushed my fingers on the mirror the axis that was not working moved easily as if it wasn't attached to anything. I could tell something was wrong with it. Other side feels like it should. I pulled the mirror back off I could tell the wires had not been pinched.
I went back and completely read the page for the link above and noticed the info about notching the area between the screws to avoid pinching the wires.
With the new set, I will be removing some plastic to assure no pinching this time. Better safe than sorry though. Too bad they don't make them right to start with.