LCM swap shenanigans

[kaiv]

Ok this is stupid but the solution is eluding me.

I have this CI37 LCM which I used to run in my touring now installed in my sedan. Moved it over for the triple blink feature.

Coded properly to the best of my knowledge; VIN, mileage, build date, body style, VO list etc.

Issue: the fog lights do not work. Nothing happens when I press the button. No relay clicking, no logo lighting up in the cluster, nothing.

The fogs themselves work. Confirmed by using INPA (bypassing the switch) and with a random spare (older) LCM.

The LCM also works. Plugged it in an M3 and the fogs work right off the bat.

But in my 330i the button press is just not registering.

Is there something uniquely different with the ZHP/sedan that am I'm unaware of?

Any ideas?

Thanks!

[Slideways]

nextelbuddy would probably know.

[nextelbuddy]

Sounds a little wonky and confusing

Have you tried changing out the faceplate?

You said that in your 330 zhp that if you use inpa you can trigger the fog lights and you also installed an older LCM that also triggered the fog lights.

Take the face plate off that LCM and put it onto your 3.7 LCM and see what happens.

[kaiv]

I did try that, no changes.

[terra]

That's really odd. Really shouldn't be a difference between coupe / sedan in this regard. Anything weird about the fog lights themselves? LED, HID, etc?

[Slideways]

IIRC, this sedan has a Xenon to LED conversion.

[stammc]

Ok this is stupid but the solution is eluding me.

I have this CI37 LCM which I used to run in my touring now installed in my sedan. Moved it over for the triple blink feature.

Coded properly to the best of my knowledge; VIN, mileage, build date, body style, VO list etc.

Issue: the fog lights do not work. Nothing happens when I press the button. No relay clicking, no logo lighting up in the cluster, nothing.

The fogs themselves work. Confirmed by using INPA (bypassing the switch) and with a random spare (older) LCM.

The LCM also works. Plugged it in an M3 and the fogs work right off the bat.

But in my 330i the button press is just not registering.

Is there something uniquely different with the ZHP/sedan that am I'm unaware of?

Any ideas?

Thanks!

Sounds like the fog light switch signal isn’t being recognized by the LCM in the sedan. I’d double check the VO coding and make sure front fogs are actually enabled (NSW aktiv) in the LCM. Also verify the build date is correct and that the sedan wiring/pinout matches the touring there can be slight differences. If it works in another car, it’s likely coding or VO related in your 330i.

[Schiffi]

What part number has your LCM? I don't know if this is your problem but the facelift sedan has a different lcm then the touring. The facelift sedan has two more rear light blubs, therefore the lcm has a different hardware. Do you have a LL or a LH lcm? FL sedan needs LH.