If you have the factory 7-way connector on your 2012 Infiniti QX56, the connector used for the brake controller will be located under the driver side of the dash. I have attached a photo that shows what the plug-in adapter on the harness that connects between the brake controller and the vehicle connector looks like. If the pins on the connector you found under the dash match the pin pattern of the connector in the photo then that is your connector. You may have to remove a small panel... view full answer...
The brake controller I recommend for your 2004 QX56 is the Prodigy P3, part # 90195. This is one of our most popular because it is easy to install and operate.
You will also need the plug-in wiring adapter, part # 3050-P. This plugs into the back of the brake controller and the other end plugs into the harness that can be found under the dash, to the left of the steering column, and will be taped to another harness near the emergency brake pedal. view full answer...
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