One tail-light is brighter than the other

[TerminatorX5]

not that it matters now, but switching power feeding pins from LCM to the tails (left pin to send power to right tail, and the right pin to send power to left tail) would have given an idea if the issue was stationary to the tails or portable with the switch... from that point, you would have narrowed down your further options...

[jsoto]

I DON'T know what the fix was....but when I brought it to my Indy for another thing and mentioned this, when I picked it up, the tail was back to normal brightness.

I figuered it was all or nothing on *power* but I suppose some programming & or re-programming resolved it.