Trailer Wiring Harness For A 2018 Chrysler 300S
Updated 04/10/2026 | Published 04/05/2026
Products Featured in This Question
Question:
Im looking at ordering this wiring harness for a 2018 chrysler 300s but there are 2 different wiring harnesses listed for my vehicle which one should I buy and whats the difference
asked by: Jamie S
Expert Reply:
Hi Jamie!
For your 2018 Chrysler 300S, I recommend the Curt T-Connector Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # C56235. This is a plug and play wiring harness that does need one wire run up to the battery for needed power, but overall it's not too difficult of an install. I included an install video we did with this harness on a 2017 300 for you to check out as well.
The other harness you saw was likely the Tekonsha T-One 118658. This harness installs the exact same way as the Curt, but their parent company is having a few issues as of late, so this was removed from our site for now.
If you don't already have a hitch on your 300, the Curt Trailer Hitch Receiver # C13093 would be a great choice. This has a 2" receiver that I always recommend when available. There are just more options available for this size hitch than there are for the 1-1/4" hitches.
What are you planning on towing?
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
- Q&A: Cargo Carrier With Ramp for RV to Carry Generator
- Q&A: How to Determine Which Ball Mount Will Have Enough Rise for Curt Hitch on a 2005 Chrysler 300c
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: Availability of Hydraulic Jacks for Horse Trailer
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: Will The EcoHitch fit a 2017 Ford Fusion Titanium AWD?
- Q&A: Recommended Setup for Flat Towing 2022 Ford F-250 Super Duty
- Q&A: Recommended 4-Way Wiring Harness for a 2019 Chrysler 300
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: 3 Bike Platform Bike Rack Recommendation for 2007 Chrysler 300
- Article: Trailer Hitch Installation Tips
Pete A.
4/10/2026
Adding on to what Lazer S wrote, the Curt T-Connector Harness is a fairly easy install and works great. The battery of the 300 is right there in the trunk so it is relatively painless to hook the harness up to it. Just follow the included instructions and take your time.