Special Requirements to Install a Brake Controller in a 2009 Porsche Cayenne
Question:
Do you still need to install a relay for the Cayenne brake signal on the newer Tekonsha 90195 P3 Electronic Brake Control?
asked by: John
Expert Reply:
Yes, there are special requirements for installing a brake controller on a 2005 to present Porsche Cayenne. You will need the following parts that are available from a Volkswagen dealer.
1 connector housing (#1J0-972-782) and
2 wire/terminal assemblies (#000-979-228)
Cut the wires from both wire assemblies in half so that you have 4 wires, each with a clip on one end and bare wire on the other. Connect the bare end of each of these wires to one of the wires on your brake controller, then slip the other end of each wire into its appropriate slot on the housing. The slots are numbered to make it easier to connect each wire correctly. The table in the linked help article shows the correct wiring connections.
The factory brake control connector is located under the vehicle's dash on the driver's side close to the door. You'll have to remove the appearance panel, which is held on by 2 Torx head screws. The factory brake control connector is underneath the panel and is wrapped in gray foam. Remove the foam and connect the housing to the connector.
You will likely need to install a relay if you're using a Prodigy or P3 brake controller # 90195. The display of these controllers can be erratic when used on 2009-current Volkswagen Touregs and Porsche Cayennes. To avoid this problem, you should install a 12V, normally open relay. Instructions and numbered diagram in the linked article will help you install the relay correctly.
1 Obtain locally, a 12 volt, normally open relay.
2 Connect the ground terminal (85) of the relay to a ground under the dash.
3 Connect the trigger terminal (86) of the relay to pin #3 of the brake control connector.
4 Connect the red wire from the brake control to the load terminal (87) of the relay.
5 Connect the source voltage terminal (30) to a 12 volt source. This wire should have a 5-amp fuse installed in-line.
![Michael H](https://images.etrailer.com/static/images/catg/people/324_tn.jpg)
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
- Automatic Leveling
- Under-Dash Box
- Dash Mount
- Up to 4 Axles
- LCD Display
- Up to 360 Degrees
- 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
- Article: Trailer Wiring Diagrams
- Article: Towing a Trailer? Let's Talk About Brake Controllers
- Article: Wiring Trailer Lights with a 7-Way Plug (It's Easier Than You Think)
- Article: Installing an Electric Brake Controller on 2007-2013 GM Full-Size Truck or 2007-Present GM SUV
- Article: How to Install a Brake Controller on Chevrolet / GMC 1999-2006 Pickups
- Q&A: What is the Difference Between the Tekonsha Prodigy P2 and the P3 Brake Controllers
- Q&A: Parts Needed to Add 7-Way & Brake Controller on 2023 Kia Sportage
- Q&A: Lightest Weight Wheel Tire Combo w/ a ST235/75R15 Tire
- Q&A: Setting Brake Power on Tekonsha Prodigy P3 Brake Controller For First Time
- Q&A: Does the Tekonsha P3 Trailer Brake Controller Turn Off or Stay On All the Time
- Q&A: Locks for Hasps and 2-5/16" Coupler With Trigger Latch
- Q&A: Where Does The Wiring Connect for the Brake Controller Install On a 2024 GMC Yukon?