I've begun upgrading my nav screen to a CarPlay enabled system, and so far so good in that area. But, the system came with a reverse camera that I'm trying to install. It requires that I tap into the reverse light positive and negative wires. Looking at the wiring harness from the reverse light, I can't figure out which ones I'm supposed to tap into. I tried reading the wiring diagram, but it may as well be chinese to me.

All I got from the wiring diagram is that one of the reverse lamp wires is yellow. I'm not sure if that's positive or negative.

 

Pull the bulb holder cover behind the light unit ..light up the reversing lights so you know which bulb it is and follow the strips to the correct coloured wire then scotch lock it on.
If its yellow its +ve -ve is black

 

yeah, this - I traced from the reversing light housing itself and posi-tapped it there.

 

I did this on a non-Jag. Hope your directions are just using for a signal and not camera power. Don’t want to fry the module.

 

I got it to work. What I did was yellow = +, and then the negative to chassis ground. Worked a treat.