SkyHighColorado
^LIFTED^
The only real way to figure it out is to trace the wires. If that's the blue wire running with that red/orange wire in the loom, follow them all the way to the end and see where they go. If they run side by side to the end then follow the red wire under your dash and see if it's spliced into either a power source or tapped into the brake lights? I recently removed my trailer brake controller and it was wired completely different to this.