Solution for 4-Way Adapter With Resistors for 2025 Bronco Sport & Kuat Piston Pro-X With LED Lights
Updated 09/29/2025 | Published 05/12/2025
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Question:
I have a 2025 Ford Bronco Sport with factory tow kit 4-Pin and a Kuat Piston Pro-X bike rack that has LED lights 4-Pin. I keep getting “Lamp Out” warnings on my dashboard and beeping. I heard this is because of the low resistance of the LED lights. You have an adapter that fixes this for 7-pin and 7-pin to 4-pin. Do you offer an adapter with the required resistor solution for 4-pin to 4-pin?
asked by: Stephen D
Expert Reply:
Hey Stephen! There are no direct adapters but we can pair two together to make this work. You can plug the Hopkins Plug-In Trailer Connector Adapter # HM54RV into your 4-way which will convert it to just the light functions on a 7-way. Then plug the Curt # C35FR into the 7-way end of that adapter to get the load resistors and stop the warning on your dash. The only other option would be to directly wire in load resistors # DI34ZR. Let me know if you need anything else.
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Product Page this Question was Asked From
Kuat Piston Pro X Bike Rack for 2 Bikes - 2" Hitches - Wheel Mount
- Hitch Bike Racks
- Platform Rack
- Folding Rack
- Tilt-Away Rack
- Wheel Mount
- Bike and Hitch Lock
- 2 Bikes
- Class 3
- Fits 2 Inch Hitch
- Electric Bikes
- Fat Tire Bikes
- Heavy Bikes
- Kuat
more information >
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Robin H.
9/29/2025
Hey Stephen, did the combination of the Hopkins and Curt adapters solve the "Lamp Out" warning on your Bronco Sport? I'm interested to know if this setup worked for you, as it could help others facing similar issues with LED lights.