4-Pole Wiring Harness Installation on 2012 Audi Q5
Updated 07/05/2017 | Published 07/02/2017
Products Featured in This Question
Question:
Installing a Trailer Wiring Harness on a 2012 Audi Q5. I have power working, and the left/right blinker but Which wire is the brake light/ running light and are these combined?? I currently have the red wire to the grey wire with black stripe on the upper tan harness. I have the brown wire grounded.
asked by: Andrew C
Expert Reply:
If you are installing a 4-pole wiring harness kit like # 119250KIT or # C59236 you'll use a circuit tester like # PTW2993 or the one included with the kit to test the vehicle's taillight wiring to find what function is carried on each one. Auto makers are not consistent with wire colors used in vehicle production, so testing is the only way to be sure you are making the correct connections. The linked videos show how to use a tester.
In standard 4-pole trailer wiring harnesses like those noted above the stop and turn signals are combined onto one wire/circuit. The green harness wire carries right stop and turn signals and the yellow wire carries these for the left side. The brown wire on a 4-pole harness output side handles running lights. Ground wires are typically white.
Featured Help Information
Miscellaneous Media
Continue Researching
- Shop: Trailer Hitch
- Shop: Trailer Wiring
- Shop: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Shop: Curt Trailer Hitch Receiver - Custom Fit - Class III - 2"
- Shop: Thule RV Wheel Levelers - Black - Qty 2
- Shop: Loctite RTV 598 High-Performance Silicone Gasket Maker - Black - 2.7-Fl Oz Tube
- Shop: 7- and 4-Pole Trailer Connector Socket w/ Mounting Bracket - Vehicle End
- Shop: Universal Installation Kit for Trailer Brake Controller - 7-Way RV and 4-Way Flat - 10 Gauge Wires
- Video: DIY Install: Curt Trailer Hitch Receiver on your 2016 Audi Q5
- Video: Best 2017 Audi Q5 Trailer Hitch Options
- Video: Set up: Curt Trailer Hitch Receiver on a 2017 Audi Q5
- Video: Mount: Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector on a 2008 Audi Q7
- Article: Brake Controller 7- and 4-Way Installation Kit (ETBC7)
- Search Results: trailer hitch
- Video: The Low-Down on the Curt Powered Tail Light Converter with 4-Pole Flat Trailer Connector
- Q&A: What is the Difference Between a Class II and a Class III Hitch?
- Article: Trailer Wiring Diagrams
- Search Results: trailer wiring
- Q&A: What is the Difference Between a 4-Way and 7-Way Trailer Connector
- Video: Curt T-Connector Vehicle Wiring Harness Review C56040
- Shop: Suspension Enhancement
- Article: How to Choose the Right Trailer Hitch Class
- Q&A: Comparing the Curt Hitch C13416 and EcoHitch Hitch 306-X7396 for a 2019 Toyota RAV4
- Shop: etrailer Trailer Hitch Receiver - Custom Fit - Matte Black Finish - Class III - 2"
- Video: Curt Powered Tail Light Converter Installation - 2023 Kia Telluride
- Search Results: trailer tires and wheels
- Shop: Brake Controller
- Search Results: trailer hitch ball mount
- Article: How to Measure for Trailer Hitch Drop
- Q&A: Installation Time for Blue Ox BX1128 Flat Tow Base Plate Kit for 2016 Jeep Grand Cherokee
on Custom Fit Vehicle Wiring
