Splicing In A Curt 4-Pole Trailer Connector To A Hopkins Towed Vehicle Wiring Kit
Updated 02/03/2026 | Published 06/23/2024
Products Featured in This Question
Question:
I have the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles Item HM56200 installed on my 2017 Jeep Wrangler. I need to install the Curt 4-Way Flat Trailer Connector for the lighting on my bike rack. Green, Brown and White wires are obvious but where do I need to connect the yellow wire into the hopkins to get the left brake and turn signal lights to work?
asked by: Wayne C
Expert Reply:
Hi Wayne,
You would need to use a tester # PTW2993 to probe into the wires for the left side of the Hopkins Custom Tail Light Wiring Kit for Towed Vehicles # HM56200 and determine which one has power when the turn signal or brake light are on. I would install diodes # RM-690 to prevent any feedback from the Curt # C58345 to the Hopkins wire harness.
Product Page this Question was Asked From
Curt 4-Way Flat Trailer Connector w/ 60" Harness and Mounting Bracket
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- Universal Fit
- 4 Flat
- Plug and Lead
- Splice-In
- CURT
more information >
Continue Researching
- Q&A: Tips for Fishing 3/8 inch Bolt Through Frame of Vehicle
- Q&A: Is There Tow Bar Lighting and Trailer Wiring Solution for 2015 Jeep Wrangler Sport S
- Q&A: What Wire Does Red Wire of Roadmaster Brake Lite Relay Connect To
- Q&A: Where to Measure for Choosing Correct Size Adjustable RV Trailer Hitch
- Q&A: Bracket Height and Receiver Tube Dimensions of Curt Adjustable Width Trailer Hitch Receiver C13702
- Q&A: Recommended Hitch for a 2025 Toyota RAV4 Hybrid
- Q&A: Is There a Coiled 5-Way to 5-Way Trailer Wiring Adapter
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Diode Installation Instructions for Dinghy with Combined Tail Light Wiring
- Article: My Trailer Hitch Doesn't Fit
- Article: Trailer Wiring Diagrams
- Article: Trailer Lighting Requirements
Robin H.
2/3/2026
Hey Wayne, how did things go with wiring the Curt 4-way connector into your Hopkins tail light kit? Your setup sounds detailed, and it’d be great to know if the diodes helped keep the signals working cleanly. Sharing what worked could really help others adding bike rack lights to a similar setup.