Lol... I just did this a couple weeks ago...If the plug has 4' or less of wiring, you will need more wire
Add about 18" of wire to each one now before you start...
White = GROUND
Yellow = Drivers side turnsignal
Green = Pass side turnsignal
Brown = Parking lights
I removed both rear covers(spare tire & glovebox) to gain access to the taillights. I removed the 2 screws and the wingnut to pull the taillight and disconnected the plug at the harness and removed the tailight & wiring with the grommet. Once they are out, get under the car with the 4 flat connector that you have already added the extra wire to. Run the
WHITE, BROWN & GREEN TO THE PASS SIDE, YELLOW TO THE DRIVERS SIDE. You will notice there is a space between the rear of body where you can see up to the tailight area, snake the wire(s) up thru there so the stick into the tailight area. Pull the tape from the grommets on the taillight harness and feed the new wires thru the grommet towards the harness connector and splice into the harness a couple of inches from the grommet. Retape the grommets, reinstall the taillights and your done.