DISCLAIMER. This is on an LHD T6.1
Today installed the aftermarket foglights to T6.1 from
Wibutec. The kit comes with wiring harness shown on my previous message.
I started by taking the battery out, and then took off the panel behind the battery. Theres 2 screws holding the panel, one is accessible no problem, the second bolt was under the windscreen scuttle panel, but I was able to just lift it a bit as someone else loosened to bolt. Behind the battery is a rubber grommet (part 1) where a big loom goes through. I didn't manage to thread the wires from the existing hole, so I just poked a new hole in the rubber grommet and pulled the wires through. In the compartment behind the panel there is a round unused (at least mine was) grommet (part 2) where I made another hole and pulled the 2 pinned wires to inside the cabin. The 2 pins connects to BCM, brown 46-pin connector, pins 3 and 40, and the last one is ground which I connected to an earth point under the windscreen scuttle panel (part 3). I routed the cable under the battery tray for a cleaner finish.
Connecting the pins were easy. I removed the light switch, under that is a screw, take it off. After this the panel is just held in with clips. After you pull off the panel unplug the traction control button and others if you have. Now you can access the BCM and the connectors more easily. The connector the pins attach to is the middle one, mine was brown colored as the 2 others were both black. Pull the connector cover away and there are 2 inner connector pieces. Pins were put to slot 40 and 3. In the connector there are tiny numbers where you can find the corresponding pinhole. After this, reassembly.
Once I got everything back together it was time for the new light switch to go in place, plug and play. Next was coding the BCM. The kit came with a OBD dongle. I installed the OBDAPP software to my iPhone, opened the hood, ignition on, motor not running. Opened app, after connecting to dongle it said the dongle was loaded with a foglight retrofit sequence (coding). I pressed on that and it gave me option to Enable, Disable and Cancel. After hitting enable it took a minute or two as the coding step were processed. Then it said turn the ignition off and on again and enjoy. I connected the foglight bulbs to the harness and tested, everything worked. Auto fogs on when van put in reverse, foglight switch worked, and when turning the wheel the corresponding foglight came on as a cornering light.
I know this probably isn't the cheapest option, but for me, the easy of install and especially the easy of coding helped to balance all the hassle.
I included some of the literature and installation guide that came with the kit. Its in German but can the translated by dropping the document to google translate.