My used 2013 Aluma MCTXL came with a flat 4. Lights "worked" but not as designed by Aluma. I will be using a flat 5 (Aluma uses the round 5 from the factory). The trailer has 6 wires: Red, Green, yellow, brown, white and black. According to Aluma the plug is as follows. (see bottom left of diagram )
Red=brake
Green=right turn
yellow=left turn
brown=running
white=ground.
How ever when I look at the plug diagram directly above it shows black as ground and does not mention the white wire. Then the wire diagram dose not mention black. Can someone make this simple for me?