Will Adapter 4-Pole to 7-Pole and 4-Pole Connect To Brake Output Circuit on 2013 Toyota Tundra
Updated 09/29/2025 | Published 05/15/2025
Products Featured in This Question
Question:
My truck only has a factory 4-wire flat. Is the wiring for the trailer brake circuit blue included from this controller to the 37185 7 pole adapter included?
asked by: Dana
Expert Reply:
Hi Dana; does your 2013 Toyota Tundra have the brake controller port under the dash? If it does, you can use the # TK77ER along with the # 37185. There will be factory wiring, including the brake output wire, you can splice the # 37185 into at the rear. If you do not have the brake controller port or the factory wiring to splice into you need the # ETBC7 to upgrade to a 7-way, along with the # 90195 with the universal wiring harness. If you have any other questions feel free to reply below.
(click to enlarge)
Product Page this Question was Asked From
Tekonsha Prodigy P3 Trailer Brake Controller w/ Custom Harness - Up to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Plug-In
- Under-Dash Box
- Under-Dash
- Up to 4 Axles
- LCD Display
- Multiple Trailers
- Tekonsha
more information >
Featured Help Information
Instructions
Miscellaneous Media
Continue Researching
- Shop: Brake Controller
- Shop: Tekonsha Prodigy P3 Trailer Brake Controller w/ Custom Harness - Up to 4 Axles - Proportional
- Shop: Adapter 4-Pole to 7-Pole and 4-Pole
- Shop: Trailer Wiring
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Q&A: What is the Difference Between the Tekonsha Prodigy P2 and the P3 Brake Controllers
- Q&A: Weight Distribution System For Towing A 2025 Airstream Trade Winds 23FBQ With 2017 Toyota Tundra
- Q&A: Availability Of Electric Trailer Dolly That Can Handle 7%-11% Grade
- Article: Towing a Trailer? Let's Talk About Brake Controllers
- Q&A: Where to Ground Brake Controller Wiring Adapter 3041-P in 2019 Toyota 4Runner
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Q&A: Adding Brakes to a Mobile Home Axle
- Article: Aftermarket Brake Control Wiring for 07-13 GM Full-Size Truck with Factory-Integrated Brake Control
- Article: Trailer Wiring Diagrams
- Q&A: Recommended Brake Controller and Plug In Adapter for a 2024 Toyota 4Runner w/the Factory Tow Package
- Article: Brake Controller Installation: Starting from Scratch
- Article: Top Weight Distribution Hitches for a Buttery Smooth Ride
- Article: 5 Things to Know About Weight Distribution Hitches
Robin H.
9/29/2025
Hey Dana, did you find the brake controller port under the dash of your Tundra? I'm curious if the solution worked for you because it could help others in a similar situation.