Its extremely cold, I totally get it. You don't have a small 12 volt?o.k. I did that. The black wire goes to a red light. The red light goes to a red light. They both work perfectly.
I need to know which one is brake/running and which one is turn signal.
on a old time light bulb I could tell from the filament, but no can do with LED. I can hook them up to the truck and test for function, but the goal here is to avoid standing around in freezing weather, connecting and unconnecting wires.