Yes, I had to rewire everything.
The taillight housing allows the outer backup lamps to be replaced with yellow bulbs = turn signals.
I installed 4 relays to feed left turn signal, right turn signal, rear fog light, brake lights.
I wired the front blinkers to the rear, on the passenger side of the car (through the hole in the firewall for the battery cable) to the two relays (placed under the subwoofer)
The origins wires had to be cut, and I connected the relays to the backup wire of the taillights. The cable to the taillights enter the car under the rear bench, left and right side. That kept the wiring easy as soon as you found out the color codes;-)
The I connected a wire from the center brake light, fed it to a delay and that to the cut original wire to the brake lights. You have to do this because the original wire transported turn and brake signals.
The original wire for turn and brake signals coming from the TPIMS in the front has to be grounded using a resistor to prevent error messages and fast flashing. Be aware the resistors get really hot (I used 21 W resistors for LED bulbs).
Finally I had to wire and install a rear fog light. You can get the housing as a spare part. I installed a switch close to the light switch and the wire everything to the back.
To power everything I put some wires from the battery to the right rear.
You can easily follow the original wires and cable paths, attach and use the channels to fix the new wires. I took me 8 hours including unmounting the interior and put everything into place after I finished.
Hope that helped
2012 Limited V6 4x4
Tow Package, Skid Plates, Tow Hooks, Tubular Side Steps, Mud Flaps, Underbody Protection
Planned: headlight washing system, amber rear blinker, rear fog light, change amber parking lights to whites, lockpick, front camera, swap RBZ to RHW