Issues Finding Stop Light Switch Wire for Trailer Brake Controller Install On Mercedes-Benz GLK
Question:
Hello, I was at an RV shop because my hitch control unit would be humming loudly, every time I step on the brakes, the humming would stop for a moment. And in addition the fuse for the hitch control would blow regularly. They put in a new hitch plug and a new controller. Running lights work, blinker work but the brake light wire has a CONSTANT 3 Volt charge, so the moment the brake light wire is connected to the control unit, ALL lights are on. It seems like it is a problem with the car wiring. Any idea what is happening and how to fix it? Thank you
asked by: Caroline B
Helpful Expert Reply:
The brake wire you need to hook up to can only have power while the pedal is depressed in order for the controller to work properly. There are several wires coming from the brake pedal and more than one have power. so you just need to be sure you find the cold wire. If you want to avoid this entirely which is what I recommend for most vehicles you can just use the Curt Echo Mobile Trailer Brake Controller part # C51180 which doesn't require any sort of brake pedal connection to function, just 12 volt power.
Product Page this Question was Asked From
Curt Echo Wireless Brake Controller - 7-Way Plug Mount w/ Bluetooth App - 1 to 2 Axle - Proportional
- Trailer Brake Controller
- Proportional Controller
- Hidden
- Up to 2 Axles
- Smartphone Display
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Towing a Trailer? Let's Talk About Brake Controllers
- Article: Brake Controller Installation: Starting from Scratch
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Trailer Wiring Diagrams
- Article: Curt Echo Full Review
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: 5 Things to Know About Weight Distribution Hitches
- Q&A: Weight Distribution Recommendation for a 2024 Jayco Flight 284BHS
- Q&A: Can The Curt Echo Trailer Brake Controller Be Used On a Vehicle With Android Auto?
- Q&A: Parts Needed to Add 7-Way & Brake Controller on 2023 Kia Sportage
- Q&A: My Vehicle has a 4-Pin Trailer Plug, but Trailer has 7-Pin Trailer Plug
- Q&A: Troubleshooting Curt Echo Brake Controller Not Getting Power/Not Connecting to iPhone
- Q&A: Will Curt Echo Allow Trailer Battery to Be Charged During Travel