How did you route the other wires? Try to figure out the best option before i do it.
Oh boy. It's an adventure.
In the back, we pulled off the floor, the right side wheel well cover, and then the panels in the corner going up the side. The wheel well cover is a pain because of the seats. It takes a lot of pulling and jiggling. On the rear door, we removed the bottom panel behind the tray, and then the bottom half of the trim around the window.
Then we pulled out the grommets from both sides of the door. There is a lot of excess rubber in there, and we cut that away while maintaining a seal to the environment. Starting from the inside corner of the car, we used a wire coat hanger to fish the wire through that rubber conduit. Then we followed the existing wire inside the door. I pulled the grommet just below the wiper motor, made it a wee bit bigger, and shoved the plug through. From the camera, I just used the existing hole at the top for the door latch, used the coat hanger to get it down to the wiper motor, and joined the wires there.
Back to the car interior, we ran the wires up the very back inside corner with the trim removed. Then we shoved it between the head liner and the upper trim all the way around to the front. At the A pillar, we unscrewed the three bolts holding that plastic trim to make a little space, and then just shoved the wire between the head liner and the glass to the center of the windshield. We had maybe a 1-2 feet extra we shoved somewhere along the way.
That was the signal from the camera. For power, we went from the fuse box under the ignition on the driver's side. That's not too bad, and I used the supplied kit to cut into a cigarette lighter fuse. The power then went under the dash and up the driver side. That is easy except it's best to remove the panel that has the hood latch. To remove that panel, you need to take the door sill out. I also took out the hard black wire cover under that door sill, and that means at least shoving aside some of the floor mat/liner.
GPS: I don't know what this would be for, so I didn't put it anywhere.
This is for LHD. I expect power and signal would come in the same side for RHD.