2017 Ram 3500 7-Way Not Sensing Brakes
Question:
I have a 2017 ram 3500 with oem 7 pin wiring. We have been having an intermittent check trailer wiring and trailer brakes disconnected message. I have been trying to troubleshoot the issue and now the oem system will not sense the brakes at all. Trailer is a 2021 shockwave 5th wheel.
asked by: Larry V
Expert Reply:
in order to determine the specific problem you will need a circuit tester to test the connector on your vehicle after disconnecting it from your trailer. Check the wiring going into your harness from your tail lights to see if those wires are carrying the correct signals, if not then the issue is with the vehicle wiring.
If the signals going to your harness are okay, you'll need to test the signals coming out of the harness, and if they are correct then your issue is likely going to be with the trailer side wiring. You will also want to check both your vehicle and trailer connectors for corrosion, which can be green or white in color. A build-up of corrosion can interfere with the signals getting through the connectors so if it is present you are going to need to replace the plug with # 18004 for the trailer side or # 74682 for your truck. You'll also need to make sure your grounds are attached to bare metal surfaces and free of any paint, dirt or corrosion.
I have added a link below to a help article on trailer wiring for you to take a look at which may also be of use. Additionally, to help prevent any type of corrosion in your connector, and increase its durability and lifespan I highly recommend using Dielectric Grease for Electrical Connectors # 11755.
Products Referenced in This Question
Dielectric Grease for Electrical Connectors, 2 oz.
- Accessories and Parts
- Trailer Wiring
- Wiring
- Dielectric Grease
- LubriMatic
more information >
Reese Multi-Plug Wiring Harness for Factory Tow Package - 7-Way and 4-Way Flat Trailer Connectors
- Custom Fit Vehicle Wiring
- Trailer Hitch Wiring
- No Converter
- Custom Fit
- 4 Flat
- 7 Round - Blade
- Reese
more information >
Product Page this Question was Asked From
- Trailer Wiring
- Trailer Connectors
- Trailer End Connector
- 0 - 5 Feet Long
- Plug and Lead
- 4 Flat
- Draw-Tite
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Replacement Magnet Kit for 12" Electric Trailer Brake Assemblies - 5,200 lbs to 7,000 lbs
- Q&A: Troubleshooting Trailer Brakes Not Working Towing With 2018 Ram 3500
- Article: Troubleshooting Brake Controller Installations
- Article: Testing Trailer Brake Magnets for Proper Function
- Video: etrailer Electric Trailer Brake Magnet Kit Replacement Review
- Q&A: Should Electric Trailer Brakes Have Continuity Between The Two Wires?
- Shop: etrailer Hitch Pin Alignment Collar for Hitch Accessories - 2" Hitches
- Search Results: 25580
- Shop: Trailer Hitch
- Article: Trailer Wiring Diagrams
- Q&A: Which Gen-Y Cushioned Gooseneck Adapter Fits 2009 Coachmen Chapparal M-278
- Search Results: hitch
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Article: How to Choose the Right Trailer Hitch Class
- Shop: Trailer Wiring
- Q&A: Does Truck with 6-1/2 ft bed Have to Use Slider Hitch for Turning Clearance with Fifth Wheel Hitch
- Article: Most Popular Wheel Bearings
- Q&A: Recommended Replacement For An Atwood GC6AA-10E Water Heater
- Shop: Suspension Enhancement
- Search Results: equalizer
- Video: B and W Fifth Wheel Review - 2019 Ram 3500
- Shop: B&W Patriot 5th Wheel Trailer Hitch w/ Slider - Dual Jaw - 18,000 lbs
- Q&A: Can Roadmaster Comfort Ride Leaf Spring Suspension Kit replace MORryde LRE Suspension Kit
- Shop: Brake Controller
- Article: How to Measure for Trailer Hitch Drop
- Search Results: stl72rb
- Search Results: trailer jack
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Q&A: 7-Way Trailer Plug Adapter or Compatibility with Lance Slide-In Truck Bed Camper
- Shop: Air Lift WirelessONE Compressor System for Air Helper Springs - Remote - Bluetooth - EZ Mount
on Trailer Wiring
