Just fixed mine with the metal collars and had the same issue. When tightened up and touching the frame the openers short out. Wrapped it in electrical tape and it works fine. Not a permanent solution, but will do until I get the plastic collars.
I know for a fact that I did not nick the wires while doing the mod. I think there must be a connection in the visor that is touching the extention arm and causing the short at the frame.