Installation of a P3 Brake Controller # 90195 on a 2005 Jeep Liberty

Question

Question:

i have a 2005 Liberty with a factory installed 7-pin socket. I noticed the factory wire that goes to the electric brake pin of the connector is 16 AWG. from all your install information it seems this should be 10 AWG to safely carry the current for the electric trailer brakes. I ordered your 7-pin socket install kit and ill install that so the wires to address this issue. My questions are: with the factory installed option are there already circuit breakers installed in the existing wiring to handle the power protection? second, is there a some sort of a connection under the dash for the controller? i looked and really didnt see anything that looked right. can you shed any more light on the specifics of an install on my vehicle?

asked by: Tony D

0

Expert Reply:

You are correct that any of the factory wiring will be protected by fuses and/or circuit breakers. Your vehicle may have a connection under the dash but in our experience the wiring to power the brake controller is not completed.

If you check under the dash and can find the mating connector, see photo, to the Tekonsha Wire Replacement for Dodge Vehicles, item # 3020-P, you can test this connection with a Circuit tester, item # 40376 if needed, If the connector has proper function, you would not need to run wiring. In this connection you should find 12 volt constant power, and power when the brake pedal is pressed. The other two connections are to ground and the brake output wire so you will not see voltage on these terminals. If the plug is functional the harness will allow you to simply plug the P-3 controller, item # 90195, in under the dash and utilize the existing wiring on the vehicle. The factory wiring should be sufficient for application of the trailer brakes.

If the factory connector is not present under the dash, Jeep typically runs a light green wire from the 7-way, at the rear of the vehicle to the passenger compartment to carry the output from the brake controller. This wire can be found under the dash to the left of the steering column or sometimes behind the kick plate on the left side of the foot well. This green wire would attach to the output wire of the brake controller, which is the blue wire.

The three remaining wires would need to be connected. The black wire on the controller supplies 12-volt power to the controller. It would attach to the positive battery terminal via a 20 or 30 amp circuit breaker. The instructions from your brake controller will state which is needed. The white brake controller ground wire attaches to the negative battery terminal. The red wire taps into the brake stoplight switch located at the top of the brake pedal. The switch can have several wires exiting it, use a circuit tester to locate the wire that only shows voltage when the brake pedal is pressed. Normally on the 2005 Liberty this wire will be a white wire with a tan tracer on it. Once found, tap the red wire into this circuit.

We offer a brake controller install kit, part # 5506 that includes the circuit breaker and the necessary 10 gauge wire to connect the controller to the battery. Ring connectors and other hardware are also
included.

You could go with the ETBC7 brake controller installation kit, but because you already have the 7-way on the rear of the vehicle, you will not need everything included in that kit. I attached installation instructions for this kit for you, because they can be very helpful for wiring the brake controller.