CMC tail light help!

I am rebuilding a CMC that someone else took apart and didn't save all the parts, my problem is the tail lights have a red wire to a single pole bulb, and a black wire and red wire to a 2 pole light socket. which one is the tail light, brake light, and turn signal. I know what color wire from the harness goes to each. and what size bulbs are used in these tail lights.........Thanks