Recommended Wireless Brake Controller and Wiring for a 2021 Subaru Crosstrek
Updated 01/06/2025 | Published 01/03/2025
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Question:
Hi. I have a Subaru Crosstrek Touring 2021 with 4 pin trailer wiring. If I use the ETBC7, 4 to 7 way adaptor and want to use the Curt wireless brake controller can I do this and where would the blue and black wires on the adaptor connect to as their will be no brake controller inside the vehicle. Many thx Graham
asked by: Graham C
Expert Reply:
Graham, yes you can absolutely use the Curt Echo Wireless Brake Controller # C51180 with your 2021 Subaru Crosstrek. Since you only have a 4-pole though, you are also going to need to add the 7-Way RV Upgrade Kit for Trailer Brake Controller Installation # ETBC7L.
This is the preferred kit over the adapter # 337TC1474P because it includes the ring terminals, breaker, zip ties, and screws for install. I've also attached a quick picture that shows you what wires to hook up and where they go.
(click to enlarge)
Product Page this Question was Asked From
Buyers Products Trailer Connector Adapter - 4-Way to 7-Way RV and 4-Way Flat
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 4 Flat to 4 Flat
- 4 Flat to 7 Blade
- Plug and Lead
- Buyers Products
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Graham
1/6/2025
Thanks Bryce but if I am using a wireless brake controller where would the blue wire on the etbc7 kit connect to as it will not need to route into the inside of the vehicle. Thx Graham