Retrofitting fog lights bumper

dcjarne123 :

Here's the wiring diagram for the front fog lights:

The "BCM" (or "J519") is what OBD11 calls the "central electrics" module

In addition, you will need to install a rotary light switch (LDS) with a front fog light position, If your car currently doesn't have a rear fog light - you need to check  how many wires are in the loom on the LDS connector. If you don't have a wire terminated on pin#5 (see below) on the LDS connector, then you will need to install this wire - back to BCM pin 29, Socket A

I don't have the P/N for the cable between the BCM and the lamp fittings (Google it)

Assuming that you have installed LED style fittings, you will need to energize the following Leuchte-sets in the BCM

Leuchte12NL LB45
Lasttyp 12 > 6 - LED Lichtmodul
Lampendefektbitposition 12 > 38
Fehlerort mittleres Byte DTC-DFCC 12 > 22
Lichtfunktion A 12 > Nebellicht links
Lichtfunktion B 12 > not active
Dimmwert AB 12 > 127
Lichtansteuerung HD AB 12 > Always

Leuchte13NL RB5
Lasttyp 13 > 6 - LED Lichtmodul
Lampendefektbitposition 13 > 42
Fehlerort mittleres Byte DTC-DFCC 13 > 23
Lichtfunktion A 13 > Nebellicht rechts
Lichtfunktion B 13 > not active
Dimmwert AB 13 > 127
Lichtansteuerung HD AB 13 > Always

Finally, you will need to tell the BCM that you have installed an LDS with a front fog-light position. How this is done depends on whether your BCM has a long-code string.

Don