[jack.allwardt]

I double checked my hookup per the mfg instructions again, and could not locate any ground lugs on the harness, and the instructions did not cover any ground connections.

There was one connector unused on one side that has a red wire going into it with only one pin. Any idea if the red wire connector needs to tie in somewhere else on the vehicle.

YES! That red wire connects to the trailer fuse--that's where the 12V comes from to make trailer lights work--the relays work off the regular lighting, but to avoid confusing the computer with too much current draw, the relays switch constant power. Good luck!