Troubleshooting 4-Way Installation on 2021 Mercedes-Benz GLC

Question

Question:

Yellow connector on the t dont matchup with the tailight harness connector

asked by: Gerardo V

0

Expert Reply:

There are only two ways the # 118747 won't line up on your 2021 Mercedes-Benz GLC. The first is if you have the coupe and not the SUV. The other is if you have the premium package. Neither of these are compatible with this wiring harness. If that is the case, you need the # C59236 if you have the SUV with the premium package or the # C59236 for the coupe.

If that is not the case, make sure you have the correct connector on the correct side of the vehicle. The taillight wiring harness will have a connection point, on both sides, matching the ends of the T-One Connector. The green wire should be on the passenger side and the yellow wire on the driver's side.

expert reply by: Robin H

0

Answer 1

Thank you for the pictures. You are definitely on the right track here. The Tekonsha #118747 is not intended for the models with the premium package. I will have customer service contact you for a return. I do not recommend cutting the plugs off of…

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Answer 2

The T-One Vehicle Wiring Harness #118747 for your 2020 Mercedes-Benz GLC 300 will only connect if you do not have the P03 premium package. The connectors for this harness are located on the tail light wiring harness located behind the access panels…

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Answer 3

Hello Sami, thanks for reaching out. According to Tekonsha, the #118747 wiring harness is correct for the 2022 Mercedes-Benz GLC 300 4matic SUV. The only known exclusion is the premium package. Those models do use a different connector, but it…

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Answer 4

The yellow plugs on the Tekonsha T-One Connector #118747 you have for your 2018 Mercedes-Benz GLC get plugged into the factory tail light connectors behind the access panels on both the passenger and driver side of the rear cargo area which is shown…

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Answer 5

According to Tekonsha, it's the PO3 Premium package that would prevent the #118747 as the connectors on the taillight wiring harness are different. From what you describe, I'd agree, it doesn't seem like you have the PO3 package, but you…

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Answer 6

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 7

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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Answer 8

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 9

Hey Jonathon thank you so much for all of that additional information! To haul your bikes behind your class C Sprinter motorhome, while flat towing your Mini, I recommend the Hollywood Racks RV Rider Bike Rack item #HLY64FR and the Roadmaster Dual…

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Answer 10

Yes, it will work. You'll just need to cut the Lance 6-pin connector out and rewire it into the etrailer Trailer Wiring 7-Way Upgrade Kit w/ Junction Box and RV Style Connector item #e99011. Here are the individual functions of that Lance 6-pin:…

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Answer 11

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

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Answer 12

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Troubleshooting 4-Way Installation on 2021 Mercedes-Benz GLC

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