I need help. I just put in a 5 pin plug for my trailer that has hydrolic brakes but i cant find a way to connect to the reverse light line to my mitsubishi outlander for the brakes to disengage. I have looked at the post for a 4 pin trailer plug but cant find the info i ned for the last wire. There has to be a nother point that i can access this line rather than running up into the hatch door.

 

Bump! I need help with this as well.

 

I figured it out myself.

Used a multimeter to try and locate a reverse wire under the cargo holder over the passenger rear fender well, but I couldn't find it.

In looking at the reverse bulbs, the cables were routed to the driver side.

I pulled back the panels and found the reverse wire - it was white with 2 grey stripes.

Tested with my multimeter to confirm. Hope this helps!