What is the light control unit?
 

I'm restoring a recently purchased 1988 300CE. The front right parking light doesn't get current when the dashboard switch is on. Current flows to fuse #3, which is the fuse for the circuit. If this was an American car from the 1960's, I would know that there was a problem in the wire running from the fuse box to the bulb. The schematic says that the wire runs from the bulb socket to a "light control unit" before running to the fuse box.


What and where is the light control unit? The grey wire with red stripe disappears into a snake pit of wiring. It will be very difficult to trace it to the light control unit without cutting a lot of wiring harness apart.


Wisdom is appreciated. This is my first Mercedes. I'm new to this insanity.

LCU
 

I think this explains it pretty well...

https://youtu.be/fTcDHqjo8_w

there's a picture for location in this thread-

http://www.peachparts.com/shopforum/tech-help/271407-red-fuses-behind-box-relay-w124.html

you have to remove the 6 phillips head screws on the fuse box to see it, not just the lift-up lid. good luck, chuck.

Thank you Mike Bear & "Pork Face"!! The symptoms described in Mike's You Tube video describes my situation. One running light is out, but no dash warning light. I had already done a web search regarding the light control module and found it in my car. I've removed it and will open it up tomorrow.

Thanks for you help!!!! Much appreciated!

What is light control unit?
 

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