Will 7-Pole Blade to 5-Pole Flat Connector Work With Utility Trailer With Brakes
Updated 12/15/2025 | Published 11/02/2024
Question:
Optronics 7way 5 flat adapter....if i cut this can I wire it to my utility trailer thst has electric brakes? I didnt know if it had enough connections to make it work before it went to cutting
asked by: Justin
Expert Reply:
Hi Justin; the # A57CCB is designed to connect your vehicle 7-way to a 5-way on a trailer. The 5-way is for trailers that have lights and an electric lockout on a hydraulic brake actuator. If that is what you have on your trailer and you want to wire it in directly you can cut off the connector and hardwire it. If you have electric brakes you want to use the # WG54006-043 instead which has your standard brake output wire and 12V power on top of the functions for the lights.
Product Page this Question was Asked From
7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long
- Custom Fit Vehicle Wiring
- Wiring Adapters
- Universal Fit
- 7 Blade to 5 Flat
- Plug and Lead
- Optronics
more information >
Continue Researching
- Shop: Trailer Wiring
- Shop: 7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter - Coiled Cable - 66" Long
- Video: All You Need to Know About the 7-Pole Blade to 5-Pole Flat Connector Wired Trailer Adapter
- Q&A: Looking For New Wheels And Tires For 1967 Streamline Duke Trailer With 7.00-15 6-Lug Tires
- Article: Trailer Wiring Diagrams
- Q&A: Replacement Parts for 2006 Marine Master Tandem Trailer
- Q&A: Adding EOH Brakes To A 2007 Mastercraft Boat Trailer With Surge brakes
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Wiring Trailer Lights with a 5-Way Plug (It's Easier Than You Think)
- Q&A: Wiring Diagram For All In One Connector From Brake Buddy Stealth System
- Q&A: Difference Between Curt HItches for 2025 Nissan Murano SL
- Q&A: Replacement Bearaing Kit For A 2013 Ranger Tandem Axle Boat Trailer
- Q&A: Comparing Dexter Surge Brake Actuators DX29FR And DX89FR
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Is It Illegal to Leave My Hitch on My Truck?
- Article: 7 Common Questions Everyone Has About Trailer Tires
- Article: 2024 Top Gifts For Outdoor Enthusiasts
Robin H.
12/15/2025
Hey Justin, how did things turn out with the 7-way to 5-way adapter for your trailer? Did switching to the Bargman 7-way cable give you the brake connection you needed? Your update could make it easier for others working on similar wiring setups.