W204 Fog Light and Brake light swap
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Joined: Jun 2021
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W204 FL
W204 Fog Light and Brake light swap
I would like to switchi the rear fog light with the brake light. I prefer the brake light to be in the upper part of the taillight where it is located now the fog light (LED). I can swap the wires in each taillight connector, but I notice that the brake light has 2 wires (2 bulbs). I am interested in the wiring diagram from rear SAM to tail lights. The car is W204 Facelift .
Thread Starter
Newbie
Joined: Jun 2021
Posts: 6
Likes: 0
W204 FL
I know that there is a coding for rearSAM for brakelight and foglight of which type of bulb is used (bulb or LED). PRL_BrkLmpTailLmpLed_b(now is BULB) and PRL_FogLmpSmLmpLed_b (now is LED). So I can change the type of output. I am wondering if there is any coding to swap them (software) without modifying the wiring. I belive not, but ... .
Also I am looking for wirediagram for rearSAM, for the hardware modification, because I have 2 wires for brake lights on each side. I am wondering if they are connected together on one pin at rearSAM, or are 2 different pins.
Also I am looking for wirediagram for rearSAM, for the hardware modification, because I have 2 wires for brake lights on each side. I am wondering if they are connected together on one pin at rearSAM, or are 2 different pins.
Last edited by hremus; Jun 14, 2021 at 02:03 PM.
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Joined: Dec 2017
Posts: 230
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From: NYC
2008 S550 4Matic, 2007 GL450, 2008 C300, 2018 GLE63 AMG
I have the diagram but Im saying what you want to do cant be done.... the brake out put is on two separate wires and pins on the Rear Sam, each wire requires a load, if one those bulbs was out it will throw a fault, if you bridge the wires it will throw a fault, so unless you physically open the lamp and swap the bulb locations, pretty much out of luck.. OR you can swap one of the wire and load resistor the next but depending on your region have to make sure the brake light output is enough to be seen from a distance so you dont get rear ended...
