Can Brake Controller Power Wire Circuit Amperage of 2018 Mercedes Benz GLS be Increased
Question:
My used 2018 GLS came the factory installed tow hitch packageClass III and a POLLAK round 7 wire receptical. Terminal 4 is +12Volts but only has a 15 amp fuse. Wish to use a CURT 51170 type controller but that requires a 30 amp fuse as do most brake controllers. Does the GLS have the correct wireing near the driver area?
asked by: Tom K
Expert Reply:
To increase the amperage rating of the brake controller power circuit of your 2018 Mercedes GLS for the # C51170 you'll have to bypass the vehicle wiring by running 10 gauge wire like part # 10-1-1 (sold by foot) from the black wire of the controller directly to the vehicle battery. 15 amps really isn't enough for any brake controller to activate trailer brakes.
Products Referenced in This Question
Product Page this Question was Asked From
Curt Spectrum Trailer Brake Controller - Dash Mounted Knob - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Automatic Leveling
- Dash-Mounted Knob
- Hidden
- Up to 4 Axles
- Indicator Lights
- Up to 360 Degrees
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Brake Controller Installation: Starting from Scratch
- Article: Towing a Trailer? Let's Talk About Brake Controllers
- Q&A: Comparing the Curt Spectrum Brake Controller to Redarc Tow-Pro Elite
- Article: Trailer Wiring Diagrams
- Q&A: How Does Curt TriFlex NEXT Brake Controller Mount
- Q&A: 7-Way Trailer Wiring Harness for 2024 Hyundai Santa Cruz
- Article: Installing an Electric Brake Controller on 2007-2013 GM Full-Size Truck or 2007-Present GM SUV
- Article: How to Measure for Trailer Hitch Drop
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: Recommended Plug and Play Adapter to Install a Brake Controller in a 2024 Ram 2500
- Q&A: Parts Needed To Install Curt Assure Trailer Brake Controller On a 2024 Chevy Silverado 2500
- Q&A: Which Wiring Harness Fits 2024 Hyundai Santa Cruz With Tow Package