Adding 5-Way Flat to 2023 Hyundai Santa Fe PHEV
Updated 09/30/2025 | Published 05/08/2025
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Question:
Need a 5 flat vehicle connector for a 2023 Santa Fe PHEV. This somehow taps into the back up lights to stop activation of the surge brakes when backing up. Presently have a 4flat from you. Need help locating the backup light wire.
asked by: Paul G
Expert Reply:
Hey Paul, welcome back! To add a 5-way to your 2023 Hyundai Santa Fe PHEV you need the Curt Trailer Connector Adapter - 4-Way Flat to 5-Way Flat # C57187. Unfortunately, we do not know the exact location or color of the reverse light circuit wire on your vehicle. The wire is likely in a similar location to the one in the installation video attached below. However, you will have to use a tester like # PTW2993 to identify the correct wire and tap into it.
(click to enlarge)
Product Page this Question was Asked From
Curt Trailer Connector Adapter - 4-Way Flat to 5-Way Flat - Vehicle End
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 4 Flat to 5 Flat
- Plug and Lead
- CURT
more information >
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Robin H.
9/29/2025
Hey Paul, did you manage to find the backup light wire on your Santa Fe PHEV and get the 5-way connector set up? I'm curious to know how it worked out for you, as it might help others with a similar setup.