Can the 12 Volt Power Wire from a Trailer Wiring Harness Tap Into a 12 Volt Accessory Outlet

Question

Question:

Im planning to install a Curt hitch C110721 and wiring kit 56146KIT in a 2010 VW Jetta Sportwagen, and I have a question about powering the wiring. I have heard of people taking power for the wiring from the 12V car lighter socket in the trunk area, rather than running the power wire back to the car battery. Can you comment on this option for the 2010 Jetta Sportwagen, and if it is a reasonable option, can you recommend any parts that would help me adapt the power wire to connect it to 12V trunk socket? Thanks!

asked by: Greg F

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Expert Reply:

I strongly recommend running the 12 volt power wire from the Curt Wiring Harness, # C59496, directly to the vehicle battery. The 12 volt accessory circuit was not designed to support the additional load of a trailer wiring harness. A wiring harness must have its own dedicated circuit directly to the battery. We have seen many instances where customers have tapped into a 12 volt accessory circuit, like a car lighter socket, and the harness failed. We have also seen instances where the accessory circuit on the car failed in addition to the trailer wiring harness. Also, this will typically void warranties both with the wiring harness and on the vehicle.

We understand that running the 12 volt power wire can be a more time consuming task, so we wrote a help article on tips for running this power wire. I have attached the article for you to check out. On your vehicle, there is a grommet in the bottom of the spare tire well in the trunk. You can run the power wire through that grommet up to the battery. Be sure to avoid any moving components such as suspension or steering. You will also want to avoid any areas that get excessively hot.

expert reply by: John H

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Answer 1

In my experience I have found the T-One Vehicle Wiring Harness #118811 to be the better 4-way wiring for your 2022 Volkswagen Tiguan. The internal components in the powered converter do not go out as often as those in the Curt T-Connector #C56403.

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Answer 2

Per Tekonsha, the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector #TK62VR is designed for use with 2019 - 2023 Volkswagen, Tiguan whereas the T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector #118811 is only designed for…

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Answer 3

We do have photos for you to check out of a Volkswagen Tiguan with the Draw-Tite Trailer Hitch Receiver #DT53GR. I have added photos for you below of a Tiguan with the ##DT53GR, and as you can see the hitch is concealed with only the receiver…

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Answer 4

The T-One Wiring Harness #118563 will fit your 2016 Mazda CX-5 but needs to connect to the battery. This wiring harness has a powered converter so it requires a direct connection to the vehicle battery to power the trailer lights. Connecting the…

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Answer 5

The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector #118648 has a maximum amperage of 2.1 amps per circuit for the stop/turn lights and 7.5 amps per circuit for the tail lights. It is designed for a 15 amp fuse, so I can't…

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Answer 6

On Draw-Tite ball mount #2793, from the center of the hitch pin hole to the nearest part of the support gusset it is 4 inches. From the center of the hitch pin hole to the furthest part of the gusset is approximately 6-1/2 inches.

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Answer 7

The speed rating limitation for a trailer will come down to the tires, it has little to nothing to do with the axle, hub, or wheel size. That said, smaller tires generally do have lower speed ratings but you do not need to upgrade the wheels on your…

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Answer 8

Yes, we have confirmed that the Tekonsha #118811 will fit the 2023 VW Tiguan. The T-One connectors will plug into the connection points in the rear cargo area. Once installed, you'll have a 4-way to power your trailer's signal lights. If you…

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Answer 9

The benefit to a non-powered trailer wiring harness is that it's a bit easier to install since you don't have to run a wire up to the battery of the vehicle. The advantage to a powered kit is that it does a better job protecting the taillight…

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Answer 10

I would be happy to help! First the Curt Trailer Hitch Receiver #C13381 is indeed confirmed to fit your 2021 Volkswagen Tiguan. The reason it was pulled down as a confirmed fit for a bit was due to the 2021 Tiguan requiring mounting hardware where…

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Answer 11

The hitches that we carry for your 2014 Volkswagen Jetta SportWagen, have very similar clearance distances. I have attached a photo of a hitch and the clearance distance marked. The 10-1/2 inches is from the top of the receiver opening, so the bottom…

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Answer 12

Yes, the EcoHitch Hidden Trailer Hitch Receiver #306-X7311 will fit your 2016 Volkswagen Jetta as indicated by our fitguide. If you check out the attached photo from the installation instructions you can see that there is actually some trimming of…

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Can the 12 Volt Power Wire from a Trailer Wiring Harness Tap Into a 12 Volt Accessory Outlet

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