Recommended Wiring Harness and How to Install on a 2024 Ford Transit T350
Updated 03/29/2026 | Published 03/21/2026
Products Featured in This Question
Question:
I am not sure where to splice in for tail , brake, and turn.
asked by: Bill
Expert Reply:
Hey Bill, welcome back! The Curt T-Connector Vehicle Wiring Harness item # C56327 you were looking at is custom fit for the 2024 Ford Transit T350 for the models with single rear wheels. The power wire and ground are going to be the only wires you'll actually have to run. The white ground wire will need to be firmly connected to a bare piece of metal near where you mount the module. The 12v power wire will need to be ran up to your Transit's battery.
The custom fit plugs on the Curt item # C56327 will connect behind your rear tail lights directly to the factory wiring harness that runs to the lights. This will control your tail, brake, and turn light functions.
I've linked an installation video below to show you where the connections need to be made.
Please note that if your Transit T350 is a dually you'll need the Curt item # C42MJ. The installation process is identical. The only difference is that the dually's have different connectors on the tail lights.
Are you towing a trailer or adding lights to an accessory like a bike rack? What has you installing a 4-way connector?
You can add this information, along with any other questions you have, where it says Add Comment.
(click to enlarge)
Sam
3/24/2026
Very easy to install and still working great to this day for me. Mine came with plugins that plugged into the back tail lights just plug and go real simple. Then run the power wire up to your battery The kit gives you more than enough length ??
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
- Vehicle End Connector
- Powered Converter
- No Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Hidden
- CURT
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Search Results: 57184
- Q&A: Parts Needed To Add 7-Way And Brake Controller To 2024 Ford Transit T-250
- Video: Curt T-Connector Vehicle Wiring Harness DIY Installation - 2024 Ford Transit T250
- Shop: Curt Venturer NEXT Trailer Brake Controller w/ Plug-In Harness - Up to 3 Axles - Time Delayed
- Search Results: 3/8 hook
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Shop: Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector
- Search Results: trailer wiring
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Guardian Comfort Custom Floor Mat for Cargo Vans - Charcoal Gray - Carpet
- Q&A: Do You Have An Installation Video For My 2023 Ford Transit T250 Curt Wiring Harness?
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Q&A: Parts Needed to Add Brake Controller to 2026 Ford Transit T350
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Video: Review of CURT Custom Fit Vehicle Wiring - Trailer Hitch Wiring - C42MJ
- Search Results: etbc 7
- Search Results: 337tc1474p
- Video: The Low-Down on the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Q&A: Recommended Wireless Brake Controller and Wiring for a 2021 Subaru Crosstrek
- Article: How to Install an RV Awning From Scratch
- Search Results: 7 pin
- Search Results: 4 pin to 7 pin conversion
- Video: Install: Universal Installation Kit for Trailer Brake Controller on a 2018 Ford Transit T250
- Video: In-Depth Review of the Universal Installation Kit for Trailer Brake Controller
- Video: Curt T-Connector Vehicle Wiring Harness Installation - 2016 Ford Transit T350
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: How To Tell If a Ford Transit Has the Tow Package and Parts Needed To Add It
- Q&A: Plug-Ing Trailer Wiring Recommendation for a 2023 Ford Transit T250
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
on Custom Fit Vehicle Wiring
Pats T.
3/24/2026
First of all do not cut any wires, you will just ruin the harness and never get it connected. As Jerred said this wiring is specific to the Transit 350 and shares the plugs and wiring for the factory turn, brake and running lights. When you remove the tail lights and see the connectors all will make more sense. BTW, there are a couple of channels in the frame and body to get the wire from one side to the other and also a channel to the outside of the van (to underneath) for the flat 4 wire connector. Only two wires to connect are the power and the ground. If the van interior is bare you can run the power wire from the back to front through the body, then attach at the power source at the left side of the drivers seat.