Am hooking up my brake controller red wire to my brake light switch on my 95 S10 Blazer. Wires coming out of the brake light switch are orange,white,brown and 2 purple. I've tried probing them with the ignition switch on, but they all show hot when probed with the brake pedal depressed or not. So, I have no idea which one to hook to. What are your thoughts?

 

I found it. It was the white wire.