Hello, I'm currently working on installing an aero kit on my 2012 R56S, and I've hit a snag with the rear fog lights.

The Cooper S has rear fog lights that serve a dual purpose, functioning as both reverse lights and brake lights. The wiring is routed to a board with two bulbs that handle these functions. I've noticed that there are three wires going into the connector for this board, which I believe are crucial.

As many of you know, the JCW gives you a choice between a brake light or a reverse light. From what I've seen, the right side functions as a reverse light, and the left side as a brake light.

However, when comparing the photos, the wiring doesn't seem to match up, and I can't figure out how to make this work. Aaron from Out Motoring suggested that my only option might be to rewire and attach the JCW connector, wiring the ground and reverse light for each side.

I've included some photos below. If anyone has experience with this, I'd really appreciate any advice.

Large fog light is cooper S and small one is JCW.

3 pin male connector on cooper s

Cooper S Fog Light housing on bumper

Cooper S female connector

Cooper S wire connection, ground, reverse, and break. I still need to find a trusted buddy to put in revers and not run me over so I can determine which is which?

JCW fog light

JCW 2 pin male connector I’m assuming ground and brake or revers

I can convert my coopers a female socket to this two piece female connector to work with the JCW fog light.

The bumper I’m adding.

 

Glad that you brought this up, cause I was going to put an Aero kit on my R58 and was wondering about this same thing. Hope someone chimes in.

 

I think you can tell from the traces which pin goes where on the LCI bulb holder.

Older one I think is only reverse light? Not sure if the rear fog is in the main tail light or what.

I thought you were able have the car in 'Run' - like key in, push start without standing on the brake/clutch and the lights will all work?

 

Well on the drivers side, green is reverse, brown is ground. I installed a backup cam so I found that one out.

For the passenger side, I'm pretty sure blue/grey is reverse, brown is ground.

 

Have my Aero kit get getting painted this week and found this wiring harness on ECS for the rear reversing lights. Hope this helps...

Wiring harness adapter