Parts Needed To Get A Curt Echo C51180 Brake Controller Working On A Vehicle With A 4-Flat
Updated 05/08/2026 | Published 05/05/2026
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Question:
Regarding Curt 51180 , my vehicle has a 4 plug connector and I use a 4-to-7 adapter. Will this controller activate the trailer brakes without additional wiring?
asked by: Douglas E
Expert Reply:
Hi Douglas!
It's almost that simple to get the Curt Echo Wireless Brake Controller - 7-Way Plug-in w/ Bluetooth App - Up to 2 Axles - Proportional # C51180 working, but not quite.
What you are going to want to add is the 7-Way RV Upgrade Kit for Trailer Brake Controller Installation - 12 Gauge Wires # ETBC7L. It will piggyback off your 4-Flat, but you do need to run a wire up to the battery for 12 volts of power. The brake controller needs to have that to work properly. Other than that, you just mount the 7-Way and you are good to go. I included a diagram for this as well as it will help visualize everything.
What are you planning on towing?
(click to enlarge)
Product Page this Question was Asked From
Curt Echo Wireless Brake Controller - 7-Way Plug-in w/ Bluetooth App - Up to 2 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Plug-In
- Smartphone App
- Under-Dash
- Up to 2 Axles
- Smartphone Display
- Multiple Trailers
- CURT
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Bill B.
5/8/2026
Hello Douglas. I purchased a GMC Acadia Denali with Hands Free Driving. The car came with factory trailer package including 7 pin harness. I have always installed the trailer brake modulator in previous trucks and cars. When I tried to install, I could not locate the proper harness to tie into. I contacted GMC, UHaul, and a local trailer sales company. No one could help me figure it out. I finally purchased the Curt Echo set up. For me, it works perfectly. Last summer I traveled from Tennessee to Ohio. The Echo worked just as advertised. Next month, Tennessee to Montana. The learning curve was short. I suggest that you watch a UTube video or two. I am confident that the Echo will work well for you.