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How to Install Brake Controller To a 2005 Jeep Liberty With a Factory 7-Way

Question:

where does the brake controller connect on a 2005 jeep liberty crd with factory tow? these vehicles have the factory 7 wire connector installed.

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Expert Reply:

To install a brake controller on your 2005 Jeep Liberty you will need to hardwire the wires from the back of the brake controller to the vehicle. This vehicle does not have a brake controller port that you can plug the brake controller into.

The four wires on the back of the brake controller are:

White: Ground, attached to the vehicle negative battery terminal.
Black: 12v power lead, attached to the positive battery terminal with a 20amp or 30amp circuit breaker. Use the 20amp breaker if your trailer will typically only have 1 to 2 sets of brakes, or use the 30amp if your trailer has 3 to 4 sets.
Blue: Electric brakes, attached to the blue electric brake wire on the 7-Way connector at the rear of the vehicle.
Red: Stoplight switch, normally located directly off the vehicle's brake pedal. Attach to the wire on the switch that only has a signal when the brake pedal is pressed.

I am including a link to a FAQ page on brake controller wiring.

Since you have a 7-way connector at the rear of your Jeep then you will want to look for a blue (brake controller) wire to be stored up under the drivers side of the dash. It will be taped to the back of another harness. You will run the blue brake output wire from your brake controller to this wire.

The stoplight switch will be underneath the driver side dash as well. This wire is white and has a tan tracer. I would recommend using a circuit tester like the Quickee Tester, part # 40376 to verify that this wire has voltage when the brake is applied and none when the brake is not being applied. You will attach the red wire from the brake controller to this stoplight switch wire.

Next, you will want to run the black power wire of the brake controller through a 20 or 30 amp breaker to the positive side of your battery and run the white ground wire to the negative side of your battery.

You can use the Draw-Tite Wiring Kit, part # 5506 to connect the black and white wires from the brake controller to the vehicles battery.

If you do not already have a brake controller I would recommend the Tekonsha Prodigy P2 Proportional Brake Controller, part # 90885, this controller is one of our best sellers. It is easy to set up and easy to use. I am including a link to the installation instructions for the brake controller.

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Jeff D

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