How to Fix Backfeed From Trailer Battery and Solar Controller on 2024 GMC Sierra 2500
Question:
I have a 2024 GMC Sierra and a fifth wheel with solar and controller. The Brake controller is throwing messages to my dash DIC saying the trailer brakes are connected and disconnected. GM put out a message saying the solar is charging the battery to say 14v and sending it back to the truck and causing the brake controller to wig out because the volts coming back are higher than the trucks voltage. If I install this diode Part RM-790, at the trucks 12V+ hot going to the trailer, will this stop the issue by not allowing the higher voltage coming back from the trailer? How would I wire it with the two spades on the one side? Or should I wire the diode at the trailers battery? Thanks
asked by: Anthony S
Expert Reply:
Installation of the # RM-790 will take care of that problem you're having. I would wire it on the trailer side at the battery rather than mess with the wiring on your 2024 Sierra 2500. The other solution is to follow the GM note and add a disconnect between the battery and solar controller like other trailer manufacturers have started to do. If you want to go that route you can use the # SE29VR.
Products Referenced in This Question
Seaflo Battery Disconnect Switch for Boats and RVs - On/Off - 900 Amps
- Accessories and Parts
- Battery
- Disconnect Switch
- Seaflo
more information >
Product Page this Question was Asked From
Roadmaster Hy-Power Diode - (Qty 1)
- Accessories and Parts
- Tow Bar Wiring
- Diodes
- Roadmaster
more information >
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Seaflo Battery Disconnect Switch for Boats and RVs - On/Off - 900 Amps
- Q&A: Can The Seaflo Battery Disconnect Switch # SE29VR Be Mounted To a Wood Surface?
- Video: Seaflo Boats and RVs Battery Disconnect Switch Installation - 2021 Dutchmen Coleman Lantern Travel T
- Shop: B&W Ball and Safety Chain Kit for Ford, GM, Chevy, and Nissan Titan XD Underbed Gooseneck Hitch
- Shop: MB Sturgis Propane Pigtail w/ Back Check - Type 1 x 1/4" MIF - Stainless Overbraid - 2'
- Shop: Roadmaster Hy-Power Diode - (Qty 1)
- Shop: Roadmaster Single Park Light Diode
- Q&A: Diode Recommendation to Prevent Trailer Battery From Backfeeding onto Vehicle Wiring
- Q&A: Roadmaster Diode 7-Wire to 6-Wire # RM-15267 Wiring Diagram for Motorhome to 2016 Ford Focus
- Shop: Hydrastar Electric Over Hydraulic Actuator Adapter Module for Ford and Chevy Brake Controllers
- Video: Roadmaster Hy-Power Diode Review
- Q&A: Troubleshooting Incompatibility Error Brake Controller 2024 Chevy Silverado 3500
- Q&A: What Is The Recommended Lug Nut Torque On 7,000lb Axles?
- Q&A: Adding a Battery to an Enclosed Trailer with a Breakaway Battery Already Installed
- Q&A: Diode Recommendation for Taking Two Power Sources from Solar Panels
- Shop: Roadmaster Battery Charge Line Kit for Towed Vehicles
- Video: Review of Roadmaster Tow Bar Wiring - Single Park Light Diode - RM-690
- Video: HydraStar Electric Over Hydraulic Disc Brake Actuator Installation - 2017 Grand Design Solitude Fift
- Video: Review of Roadmaster Tow Bar Wiring Diode - RM-790
- Video: Hydrastar Brake Actuator HBA-CAM Review
- Shop: Brake Controller
- Search Results: 2021132201
- Search Results: light converter
- Search Results: gm 7 way connector
- Shop: Trailer Wiring
- Search Results: gooseneck hitch
- Article: Gooseneck to 5th Wheel Adapters
- Video: Choosing the Best Fifth Wheel Hitch
- Article: 4 Steps to Choosing Your 5th Wheel Pin Box
- Search Results: air bags
