E-Class (W212) 2010 - 2016: E 350, E 550

Wiring Help- Trailer Lights

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Old 11-04-2016, 08:39 PM
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2013 E350 4Matic
Wiring Help- Trailer Lights

Does anyone have any info about the wiring in the back of the tail lights?

I will be installing a PWM Taillight Converter to get 4-Way plug for the trailer electrical.

W212 uses one wire for the tail/ brake lights, one for the turn signal and than the last for the backup light.

There are 4 wires in the back of each tail light and I know that Brown is the ground. I need to know which one is the turn signal and then the combined tail/brake.

This is a PWM converter that does not draw power from the circuit so it will not damage any electronics , modules etc, it only monitors and then amplifies the output via direct connection to the battery.
Old 05-31-2019, 09:39 PM
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2014 e 350
I'm sorry to bother you but did you gt an answer to your question I am trying to do the same thing and can't sort it ou

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