There should not be any extra red wires. The factory harness only had the red and black wires, only one to a post. Back in the day when I installed police lights and sirens, we were not allowed to hook anything else to them or risk a fire.
Craig

2014 Ram 1500 Laramie, 73 Cuda
Previous mopars: 62 Valiant, 65 Fury III, 68 Fury III, 72 Satellite, 74 Satellite, 89 Acclaim, 98 Caravan, 2003 Durango
Only previous Non-Mopar: Schwinn Tornado