Do I Have to Run a Power Wire to the Battery When Installing a Wiring Harness on a 2018 VW Tiguan?
Question:
Instead of running the hot wire all the way to the front of the vehicle, could I simply wire it to a cigarette lighter adapter and just plug it in when in use? The adapter does have a 15A fuse built in as well. Or does the unit need to have power even when a trailer is not plugged in?
asked by: Patrick
Expert Reply:
No, you don't want to do that! The Curt T-Connector Vehicle Wiring Harness item # C56403 needs a dedicated power source ran directly to the battery. We get these questions all the time and while it seems like a pain especially when there's alternative options like the one you suggested. We have to recommend you follow the instructions so you don't damage your vehicle, the SMT module on the wiring harness, and your trailer's lighting functions.
The Curt T-Connector Vehicle Wiring Harness item # C56403 has been confirmed to fit the 2018 VW Tiguan. It will not draw power from your VW's battery unless there is a trailer plugged if you are also worried about that.
I have attached an installation video below for you that shows a good spot to run the power wire if you decide to follow the instructions. Just a heads up you will void all of your warranty protections if you hook this wiring harness up to anything but the battery for power.
Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Powered Converter
- Custom Fit
- 4 Flat
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Shop: Trailer Hitch
- Search Results: e43zr
- Video: etrailer Trailer Hitch Installation - 2018 Volkswagen Tiguan
- Video: Review of Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56404
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Search Results: c56403
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Video: Curt Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C56403 Review
- Video: Curt T-Connector Vehicle Wiring Harness Installation - 2018 Volkswagen Tiguan
- Video: B and W Ball Mounts - Fixed Ball Mount - BWBMHD30212 Review
- Q&A: Does Curt T-Connector Vehicle Wiring for VW Tiguan 2018 have to Run Straight to Battery
- Q&A: How To Run the Power Wire for the Curt T-Connector on a 2019 Volkswagen Tiguan
- Shop: Convert-A-Ball Ball Mount for 2" Hitches - 8-3/4" Rise - 10" Drop - 8,000 lbs
- Shop: Curt Ball Mount for 2" Hitches - 6-1/4" Rise, 7-1/2" Drop - 13" Long - 5,000 lbs
- Q&A: Help Locating Connection Points For Trailer Wiring Harness For 2020 Volkswagen Tiguan
- Q&A: Trailer Hitch Receiver Fit For 2018 Volkswagen Tiguan
- Q&A: Can I Connect To The 12 Volt Power Supply Outlet In The Rear Storage Area Of My 2019 VW Tiguan?
- Q&A: Why Does Power Wire for Curt Wiring Harness for 2018 VW Tiguan Require Running to Vehicle Battery
- Q&A: Photos of Draw-Tite Trailer Hitch DT53GR Installed on Volkswagen Tiguan
- Article: How to Choose the Right Trailer Hitch Class
- Video: Choosing the Right Trailer Wiring
- Search Results: hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer hitch
- Video: Choosing the Right Brake Controller
- Shop: Brake Controller