7-Way to 4-Way Adapter With Built In Resistors for 2020 Ford F-150 Towing Trailer With LED Lights
Updated 02/03/2026 | Published 06/27/2024
Question:
I have a 2020 Ford F-150 that has issues with LED Trailer lights. Which plug-in adapter works best for me? I’m looking for the 7-way to 4-way setup if possible. Thanks!
asked by: Jeff L
0
Expert Reply:
Hi Jeff; the Curt 7-Way to 4-Way/5-Way Trailer Adapter # C35FR you were looking at will do a fine job. Really any adapter that has the built in resistors will do the trick. Curt makes good products so you can't go wrong with theirs. It also gives you the option to adapt to a 5-way if you need it at some point as an added bonus.
expert reply by:
Robin H
0
Product Page this Question was Asked From
7-Way to 4-Way/5-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 7 Blade to 4 Flat
- 7 Blade to 5 Flat
- Plug Only
- CURT
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Trailer Wiring
- Search Results: 7 pin plug
- Search Results: 7 pin plug tester
- Search Results: 7 pin adapter
- Q&A: Recommended 7-Way Adapter to Trick a F-150 into Thinking a Trailer is Connected
- Video: Pollak 7-Way to RV Socket LED Circuit Tester Spec Review
- Video: Pollak 7-Way to RV Socket LED Circuit Tester Review
- Q&A: Help With 2023 GMC Canyon Not Recognizing When Trailer Is connected
- Q&A: How to Trick the Sensors on a Volvo to Stop Beeping When Using a Bike Rack
- Video: In-Depth Review of the Curt 7-Way to RV Socket LED Circuit Tester
- Video: Detailed Breakdown of the Pollak RV 7-Blade Plug End Socket w/Mounting Bracket
- Video: Curt 7-Way to 4-Way/5-Way Trailer Adapter Review
- Video: Curt 7-Way to RV Socket LED Circuit Tester Review
- Video: Review of TowSmart Trailer Wiring - ProClass Trailer End 7 Blade Connector Wire Tester - TS86RR
- Shop: 7-Way to 4-Way/5-Way Trailer Adapter for Vehicles with Lamp-Out Sensors Towing Trailers with LEDs
- Shop: Pollak RV 7-Blade Plug End Socket w/Mounting Bracket
- Shop: TowSmart ProClass 7-Blade Trailer Connector w/ Wire Tester - Trailer End
- Shop: TowSmart Circuit Tester Kit for 4-Pole Flat Trailer Connector
- Shop: Curt Auxiliary LED Indicator Lights
- Shop: Curt LED 5-Way Flat Circuit Tester - Vehicle End
- Shop: Curt 7-Way to RV Socket LED Circuit Tester - Vehicle End
- Search Results: trailer hitch
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Trailer Wiring Diagrams
- Shop: Trailer Hitch
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer wiring
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: How to Measure for Trailer Hitch Drop
- Search Results: trailer tires and wheels
Explore Expert Info
![Our Expert]()
on Custom Fit Vehicle Wiring
on Custom Fit Vehicle Wiring
Robin H.
2/3/2026
Hey Jeff, how did the Curt 7-way to 4-way/5-way adapter work out with your F-150’s LED trailer lights? Sharing what you found could help others dealing with the same lighting issue.