How to Add a 4-Way Connector in Addition to the Factory 7-Way on a Vehicle w/the Factory Tow Package
Updated 11/13/2025 | Published 10/19/2025
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Question:
Hi, do you offer a wiring harness t-connector that will allow me to tie in to the taillight wiring and adapter to a 4 pin flat trailer adapter for a 2026 Ram hd? Thanks,
asked by: Craig T
Expert Reply:
Hey Craig, congrats on the new truck. You kind of lost me at adapter for a 4-pin trailer adapter but I am pretty sure what you're asking for is the Curt T-Connector Vehicle Wiring Harness for Factory Tow Package item # C55384. This harness plugs directly into your Ram's factory wiring behind the 7-Way connector. It is a t-connector style like you referenced. It's going to give you 36" of wire length with a 4-way flat connector at the end of it.
Another option that gives you both a 7-Way connector and 4-way connector is the Hopkins Endurance Multi-Tow 7-Way RV and 4-Way Flat Trailer Connector item # HM75MV. This will replace your factory connector and unlike the factory one you can use both the 7-Way and the 4-Way at the same time. You'll just remove the connector from the bracket as shown in the picture below.
Is the item # C55384 what you were looking for?
You can add this information and any other questions you have where it says Reply to Jerred H and I'll be happy to answer them.
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Product Page this Question was Asked From
Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 4-Pole Flat Trailer Connector
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- Factory Tow Package
- 4 Flat
- Plug and Lead
- Plug-In
- Visible
- CURT
more information >
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Jerred H.
11/13/2025
Hey Craig, how did things turn out with the Curt wiring harness for your Ram? Did it give you the 4-way flat connection you needed for your trailer? Your update could make it easier for others setting up similar wiring.