Trailer wiring for a 2014 GLK 350 - Mercedes-Benz Forum
LinkBack Thread Tools Display Modes
post #1 of 2 (permalink) Old 10-11-2016, 10:28 AM Thread Starter
BenzWorld Newbie
Date registered: Oct 2016
Vehicle: 2014 GLK 350 $Matic
Location: Apex and St James, NC
Posts: 1
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Send a message via AIM to neil27539 Send a message via Skype™ to neil27539
(Thread Starter)
Trailer wiring for a 2014 GLK 350

I just installed a trailer hitch on my wife's GLK, that part was easy, not hooking up a Tekonsha TCI module for the lights. All installed, the directionals work fine, but having trouble with the stop/tail lights. According to posts elsewhere, the pink in left side harness and Blue in right are the turn signals, and that's correct, because they work fine.
Problem is some say the stop/tail are multiplexed on one wire in the left side, and that's Black/Grey. If i hook this to the stop light sensor per the manufacturers instructions, the tail lights on trailer are on all the time, but the stop lights don't do anything.
Can anyone confirm the lights are multiplexed, my test device shows they are.
Many thanks
neil27539 is offline  
Sponsored Links
post #2 of 2 (permalink) Old 05-06-2019, 05:12 PM
BenzWorld Junior Member
singman99's Avatar
Date registered: May 2010
Vehicle: 2015 GLK 350
Location: Branson, MO
Posts: 11
Mentioned: 0 Post(s)
Quoted: 2 Post(s)
wiring harness install

What wiring harness did you install? Do you have any DIY pics and instructions? My GLK is a 2015, but I'm thinking its close to the same.
singman99 is offline  
Sponsored Links

  Mercedes-Benz Forum > Mercedes-Benz Vans/Trucks/SUV/Others > X204 GLK-Class

Quick Reply

Register Now

In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Title goes here

video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome