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How Does ZCI Trailer Wiring Harness Wire to 2016 Mercedes-Benz GLC300

Question:

My customer bought the module and hitch from you for his 2016 mercedes glc 300 and im trying to wire this module into his truck . The brake / turn signal is a one wire input , and this is what i used for the left and right side . Running light has its own and the red brake pickup is not used . after programming is done and vehicle is started i loose the left and right signals . This truck used LED and low voltage systems . Do i need to go and run off the third brake bulb ???

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Expert Reply:

Since the vehicle has a multi-plexed wiring setup that has the running light on it's own circuit this is how the wires of the # 119250KIT should get ran on the vehicle.

Yellow of harness to vehicle Left Turn wire, Green of vehicle to vehicle Right turn wire & Red to vehicle Brake/Tail wire. The brown wire would not be used.

expert reply by:
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Jameson C

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