Installing Tekonsha Prodigy P2 Brake Controller in 1998 Jeep Grand Cherokee  

Question:

Expert Reply:

It sounds as if you already have the T-1 installed, you would simply plug the 4 pin connector of the T-1 into the connector on the 4 pin to 7-way adapter that was included in the ETBC7 kit. Once this connection is made, the lighting portion of the install is completed. The adapter has four additional wires that will need to be installed. The white wire should be grounded to clean metal on the vehicle, like a frame member. The purple wire is usually used to power the reverse lights on the trailer. If the trailer does not have reverse lights, this circuit need not be installed. Just tape off the end of the wire and bundle it up out of the way. The blue wire on the adapter would connect to the white wire in the jacketed cable included in the kit. The black adapter wire connects to the black wire in the cable. The jacketed cable would then be ran to the engine compartment. Take care to avoid anything that is hot like exhaust components or pinch points like the suspension. Many times there will be an existing wiring harness that runs to the front of the vehicle that you can zip tie the cable to. The black wire in the cable will attach to the positive battery terminal using the 40 amp breaker included in the install kit.

Next, mount the brake controller in the vehicle. I would recommend installing it under the dash to the right of the steering column, within easy reach of the driver. There will be four wires exiting the rear of the controller, three of which will run through the firewall to the engine compartment. The white wire will ground to the negative battery terminal. The black wire will attach to the positive battery terminal via either the 20- or 30-amp breaker included in the kit. (The instructions with your brake controller will tell you which breaker to use). The blue wire will attach to the white lead in the jacketed cable you ran from the back of the vehicle. The red wire from the controller will attach to the brake stoplight switch that is located at the top of the brake pedal. This switch will have several wires exiting it, in order to locate the correct one, you will need a circuit tester like part # PTW2993. Use your tester to check each wire until you locate the wire that only shows current when the brake pedal is pressed. Once the correct wire is found, use a quick splice to tap the red brake controller wire into that circuit. You should be good to go at that point.

expert reply by: Mike L

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