My tail lights are not stock. It's the two individual sockets (LED'S).
Also my problem was I had either taillight/brake/turn, but not more than one at a time.

As you can see in the first photo I had a cluster on my hands. It took me two weeks working on it off and on after work.
-First mistake was PO used wire nuts to secure the wires together (circled in red). Yeah that was just lazy on his part, wires were corroded. So I started by taking all the wire nuts apart cutting wire and re-nutting them back together just to see if that was the problem. That wasn't the problem.
-Next I tried to figure out if the wires were run correctly. But with 15 different wires it was a damn headache. So then I figured out that the trailer wiring curcuit wasn't doing anything (Circled in red).
-After a week of fishing through the wire I just decided to take everything out that wasn't stock. Then proceed to run the stock wires to the after market wiring to see which stock wire did what. Then I reliezed that the left socket didn't work. Bought a new one, then neither side work. Then noticed the fuse had been blown from moving wires around so much so they grounded them selves out.
-So once I figured out which wire was doing what, then hard wired everything in. Turns out that the sockets/LED bulbs in them will only do two things. So I wired the brake/running lights to work. Went to local bike shop got a turn signal/tag bracket mount got home installed it on the bike, wired up the signals and was good to go.

Need anything else just let me know.