Trailer Brakes Lock up on 2022 Ram 2500
Updated 12/15/2025 | Published 11/05/2024
Products Featured in This Question
Question:
I have a 2022 Dodge Ram 2500 that I just bought used with less than 10k on the odometer. When I plug in my trailer the brakes lock up right away, the controller reads nc but all the lights and turn signals work . I can’t seem to adjust the controller down to unlock the brakes.
asked by: Jim B
Expert Reply:
Hello Jim,
There are many possible issues with the trailer brakes locking up on your 2022 Ram 2500, so I'll give a number of troubleshooting steps. You will need to find out if the issue is on the brake controller or truck. To test the brake controller, sever the blue wire a couple inches from the back of your controller. Then use a circuit tester to test the end of the blue wire coming out of the controller. It should only have power when you apply the manual override; if it shows power at idle then there is an issue with the controller and it will need to be replaced, which you can do with # TK89UR.
If the controller tests fine, reconnect the blue wire and move on to the truck side trailer connector. Often, corrosion or dirt may be the cause of a short in a trailer connector. Check the plug to see if there is any type of corrosion built up that may be hampering its functionality, or if there is some type of damage; if there is you can replace it with part # HM40975.
You will also want to test the brake output pin on the 7-way socket; it should only show power with the manual override. If it shows power any other time then there is a short somewhere between the connector and the brake controller you will need to find. This would be difficult though and would likely require you to take it to the dealer or auto shop for repairs.
Product Page this Question was Asked From
7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- Vehicle End Connector
- No Converter
- No Tow Package
- 4 Flat
- 7 Blade
- Plug Only
- Hopkins
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Trailer Wiring Diagrams
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: Brake Controller Installation: Starting from Scratch
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: How to Measure for Trailer Hitch Drop
- Q&A: My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug
- Article: Wiring Trailer Lights with a 4-Way Plug (It's Easier Than You Think)
- Q&A: Parts Needed to Add 7-Way and 4-Way to 2023 Ford F-150
- Q&A: 7-Way and 4-Way Trailer Wiring Combination for 2015 Ram ProMaster 1500
- Q&A: What is the Difference Between the Tekonsha Prodigy P2 and the P3 Brake Controllers
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
John H.
12/15/2025
Hey Jim, what ended up happening with the trailer brake issue on your Ram 2500? Did testing the blue wire or checking the 7-way connector help narrow down the cause? Your update could make it easier for others facing the same problem.