My brake wires are black and white (look like romex). My break away switch wires are red and gray. My break away switch was disconnected and the wires were tied together and stuffed back into the wall. When I re-wired the 7-way, I used the OEM wire colors out of the trailer side for future ease of identification.
This is what it looked like when I started.
This is what it looked like when I finished.
A jumper light, a multimeter, a small battery charger, and a 7-way tester were my tools of choice.