According to the installation instructions, the Hopkins Agility Brake Controller you mentioned can only be mounted between + 70 and - 20 degrees of the direction of travel, as shown in the diagram I provided. Installing the controller in any other orientation will cause the accelerometer in the unit to malfunction, resulting in poor or no braking.
The Tekonsha Prodigy P2, part # 90885 can be mounted in a 360 degree orientation, which means that it can be mounted upside down as long is... view full answer...
The factory harness on a 2011 Infiniti QX56 is located underneath the dash, to the left of the steering column, taped to another harness near the emergency brake pedal. It can also sometimes be behind a trim panel to the left of the emergency brake. Sometimes it helps to fully engage the emergency brake when looking for the factory harness. Us harness # HM47635 to plug in the controller to the vehicle. view full answer...
You can absolutely install an aftermarket 7-way, to use a brake controller on your 2005 Infiniti QX56.
In order to by-pass your current broken 7-way you will need to use the Vehicle Wiring Harness Kit # C59496. This will splice into your lighting and provide a 4-way connector. You will then use the Universal Installation Kit for Trailer Brake Controller # ETBC7 to adapt the 4-way into a 7-way.
This will provide you with a functioning 7-way to use the Redarc Tow-Pro Liberty Brake Controller... view full answer...
I would recommend you install it below and to the right of the steering wheel, on the lower dash piece that will be nearest to your right knee. Check out the picture I attached to see this area.
I attached installation instructions as well as an installation video for this product for you to check out also. view full answer...
When no trailer is connected the light on brake controller # 39523 will either be flashing or off. If it is green all the time with no trailer connected that indicates a short to ground. This normally occurs when there is corrosion on the pins or where the wires attach on the trailer connector.
The Reese Pod brake controller should be connected as follows.
White - Ground
Black - 12 Volt Constant Power
Red - Cold Side of the Brake Pedal Switch
Blue - Trailer Brake feed to Trailer Brakes view full answer...