Trailer Wiring and Flat Tow Wiring for 2025 Bronco Badlands SAS
Updated 04/26/2026 | Published 04/22/2026
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Question:
I have a 2025 Bronco Badlands SAS and would like to wire it for towing and also at the same time wire it to be flat c towed. Can you recommend the kits needed for this? Thanks Scott
asked by: Scott D
Expert Reply:
Hey Scott! It looks like your 2025 Bronco Badlands SAS comes with LED lights so for trailer wiring you can use the Curt T-Connector Vehicle Wiring Harness # C42WR. This plugs into the connection points behind your tail lights and will provide you with a 4-way to power your trailer lights. If you're looking for a 7-way, you need the Tekonsha OEM Replacement Vehicle Wiring Harness w Brake Controller Adapter # TK55VR instead.
For flat tow wiring, I recommend the Roadmaster Smart Diode Kit # RM38FR. Roadmaster makes the most reliable tow bar wiring, and this kit is specifically designed for variable voltage LED tail lights like yours. Do you have the rest of your flat tow setup picked out yet?
For a complete setup I recommend the following:
-D-Ring Bumper Mounts to Roadmaster Tow Bars # RM-035-1
(Fits Ford Performance Heavy Duty Modular Bumper)
-Roadmaster Falcon 3HD Tow Bar # RM27NQ
-Roadmaster 80" Hybrid Coiled-to-Straight Safety Cables # RM-674
-Curt RVibrake 4 Portable Flat Tow Brake System # RVI44FR
-etrailer High-Low Adjustable Adapter # e52ZV
If you have any additional questions feel free to reach out in the comments below.
(click to enlarge)
Van
4/26/2026
Only connect one of the grounds from the smart diode. This is probably not allowed, but I used an LOD bumper because I wanted to put a winch in it and use it to tow as well. It was an easy install. I did it all at the same time.
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
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Terry U.
4/26/2026
Following the YouTube video made the installation seamless. Suggestions_ *Power wash underneath driver side of vehicle (when wiring from battery to rear) prior to installing. *Supplement wire protection with flexible conduit / sleeve / split-loom tubing. This applied from battery to rear, and from driver to passenger taillights. *Secure w/ zip ties (I secured at 1ft intervals. Overkill for some, appropriate for me)