Is Added Wiring Needed to Install Prodigy P3 Trailer Brake Controller on 2018 Audi Q7 With 7-Way
Updated 07/21/2020 | Published 06/09/2020
Question:
I want to attach a Tekonsha P3 to a 2018 Audi Q7 for a 2-axle trailer with electric brakes. The Audi has a tow package factory installed, including the 7-pin coupler on the back. Do I need any additional dealer work to be able to attach the brake controller, or does the Audi already have all that is needed for me to install the brake controller?
asked by: Gavin K
Expert Reply:
Even with the factory 7-way, your 2018 Audi Q7 does need additional wiring from the Audi dealer to install the Tekonsha Prodigy P3 Trailer Brake Controller # 90195.
You will need a quantity of one of the 1J0-972-782 housing and a quantity of two of the 000-979-228 wire/terminal assemblies. I have added a link to the tech bulletin for you.
Product Page this Question was Asked From
Tekonsha Prodigy P3 Trailer Brake Controller - 1 to 4 Axles - Proportional
- Trailer Brake Controller
- Proportional Controller
- Electric
- Electric over Hydraulic
- Splice-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
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Article: Brake Controller Installation: Starting from Scratch
- Q&A: What is the Difference Between the Tekonsha Prodigy P2 and the P3 Brake Controllers
- Article: Trailer Wiring Diagrams
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Article: Towing a Trailer? Let's Talk About Brake Controllers
- Article: Installing an Electric Brake Controller on 2007-2013 GM Full-Size Truck or 2007-Present GM SUV
- Article: Aftermarket Brake Control Wiring for 07-13 GM Full-Size Truck with Factory-Integrated Brake Control
- Q&A: Brake Controller Wiring for Ford E-450 Motorhome
- Q&A: Brake Controller Recommendation for a Truck with Air Brakes and a Trailer with Electric Brakes
- Q&A: Is There Downside to Going with 7500 Air Lift Kit Over 5000
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Q&A: Alternative 7-Way Connector for the Kia R0F67 AC600 on a 2025 Kia Carnival
Erik B.
7/16/2020
I wired my p3 with the relay following the service bulletin for a VW Touareg and when I plugged in the controller without the engine running, I got a CAUTION POWER LOSS Verify Brakes message. When I tested the controller wires, the red and black are hot, the white is ground and the blue is dead. Is this correct or did I wire the relay wrong.