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W221 S550 illuminated door sill installation

2809 Views 1 Reply 2 Participants Last post by  Arlind86, 
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I purchased a set of illuminated door sills for my 2007 S550 (W221) from formymercedes (@ $220). The installation process has been pretty straight forward even without detailed instructions, but I have a question.

I pulled the B-pillar panel in an attempt to find a hot lead and ground that turn on/off with the door. There is a courtesy light in the bottom of the door and I pulled the light hoping it would identify the wire colors that I needed to tap in the pillar, but somewhere in the door panel it was converted to a ribbon cable.

Can anyone tell me the correct wire colors for +/- in the B-pillar that will allow the lights to turn on and off with the courtesy light for the drivers and passenger side?

Thanks!
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Arlind86
Ricky's Rants said:
I purchased a set of illuminated door sills for my 2007 S550 (W221) from formymercedes (@ $220). The installation process has been pretty straight forward even without detailed instructions, but I have a question.

I pulled the B-pillar panel in an attempt to find a hot lead and ground that turn on/off with the door. There is a courtesy light in the bottom of the door and I pulled the light hoping it would identify the wire colors that I needed to tap in the pillar, but somewhere in the door panel it was converted to a ribbon cable.

Can anyone tell me the correct wire colors for +/- in the B-pillar that will allow the lights to turn on and off with the courtesy light for the drivers and passenger side?

Thanks!
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Doubt you'll find an answer for that. I would get a test lighter and go from there. The other thing you could try is find the wires for the driver's door light which I would ping/test at the driver's door hinge / rubber boot on the footwell area.

That is the closest thing that might give you the correct light each time you open the door. If you know someone who installs remote starter units for living they would be perfect for this job.
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