Is Added Wiring Needed to Install Prodigy P3 Trailer Brake Controller on 2018 Audi Q7 With 7-Way

Question

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

0

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.

expert reply by: Kyle S

0

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.

Reply

Chris R.

7/21/2020

The black wire should be hot since this your power wire going into the controller, but the red wire should only get power when stepping on the brake pedal. Make sure you have the red wire from the P3 connected to the correct circuit on your Touareg. This is likely what's causing the error message as well.

Reply

Answer 1

We have the best luck with the Prodigy P3 #90195 and P2 part #90885. There isn't a controller out there more reliable and better performing that these. The Curt Triflex part #C24VV isn't a bad controller but it's just not quite the same.…

view full answer...

Answer 2

The best brake controller for your 2021 Audi SQ7 is going to be the Curt Echo Wireless Trailer Brake Controller item #C51180. The Echo plugs directly into your Audi's 7-Way connector and allows you to control the settings through an app on your…

view full answer...

Answer 3

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

Answer 4

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

view full answer...

Answer 5

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

view full answer...

Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

view full answer...

Answer 7

The Redarc Tow-Pro Liberty #RED24FR is the way to go over the Elite #RED44FR as you get the nicer functions of the Elite at a lower price. The Elite has the ability to be the more preferred proportional style of controller as well as a time-delayed…

view full answer...

Answer 8

You do have the option to utilize the air brakes on your 2023 Freightliner Cascadia to control electric trailer brakes using the Hayes Air Actuated Trailer Brake Controller, part #HA100400C. However, we mostly recommend just using an electric brake…

view full answer...

Answer 9

Yes, when installing the knob for the Redarc Tow-Pro Liberty Brake Controller item #RED24FR you will want to remove any extra material behind the insert. I am happy the video was able to help you out. I have linked a couple of pictures from the video…

view full answer...

Answer 10

Sure thing, I will go ahead and list out what you need for your 2023 Kia Sportage to add a 7-way for a brake controller so you can tow with the Curt Trailer Hitch Receiver #C94WR: - T-Connector Vehicle Wiring Harness with 4-Way Flat Trailer Connector…

view full answer...

Answer 11

You're right, the mounting bracket is unique (in a good way) for the Curt TriFlex NEXT Trailer Brake Controller #C24VV. The bracket is smaller and all you do is put the included adhesive tape on the bracket and stick it wherever you like under…

view full answer...

Answer 12

If your vehicle has a factory brake controller plug, you can simply use the Tekonsha Plug-In Wiring Adapter for Electric Brake Controllers – Ford, Item #3034-P, which will connect to the vehicle plug and the brake controller. On the new E-450…

view full answer...