Wiring instruction without plug and play harness (tapping into factory wiring)

 11-14 WRX/STI

LIGHT SIDE -> VEHICLE SIDE

  1. BLACK -> BLACK
  2. RED ->  RED/WHITE STRIPE
  3. WHITE -> BROWN/YELLOW STRIPE
  4. GREEN -> BLACK/WHITE STRIPE

 2015+ WRX/STI

LIGHT SIDE -> VEHICLE SIDE

  1. BLACK -> BLACK
  2. RED -> BROWN
  3. WHITE -> BROWN/YELLOW STRIPE
  4. GREEN -> BROWN/WHITE (MAY BE BLACK/WHITE ON SOME VEHICLES)

Wiring instructions with plug and play harness

LIGHT SIDE -> PLUG AND PLAY HARNESS 

  1. BLACK -> BLACK
  2. RED ->  RED
  3. WHITE -> WHITE
  4. GREEN -> GREEN

Once wires are connected to the plug and play harness , simply plug the harness into the factory tail lamp wiring and you're done!