There are five wires: black is ground, then there is a blue, red, green and brown wire. Which one is the back-up wire? I'm installing a wireless back-up camera that needs to be connected to the ground wire and the back-up wire.

 

you should be able to use a 12v test light to find which wire has power when the trans is in R.

 

THANKS! We are on our way to buy the tester

 

It was the green and white wire and the camera works!!

 

glad to be of help. I don't know a ton about the jeeps yet but I have about 15 years of wrenching on other cars under my belt.