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Trailer Wiring and Tow Dolly Wiring for a 2009 Pontiac G6

Question:

How do I tell which wires in the car go to the trailer wires

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Expert Reply:

You will need to use a circuit tester, like # 40376, in order to determine the functions of the taillight wires on the 2009 Pontiac G6 if you are hardwiring a 4-Way connector to the vehicle. This involves turning on the blinkers, brake lights, and running lights in succession and then probing each wire to match the right function with the right wire. I have included a trailer wiring FAQ article that goes into more depth of wire and function below.

I recommend installing the Tow Ready Custom Fit Vehicle Wiring, # 118439. This harness plugs in line with your vehicle taillights and provides a 4-Way connection at the rear of the vehicle. Since the connectors on the harness plug into connectors on your G6, you will not have to probe wires to find the functions. I have included a link to the installation details below.

If you are towing the G6 behind a motor home or another vehicle then you will need a different type of wiring. You would need to install Tail Light Isolating Diode System with Wiring Harness, # 38955. I have included a video demonstration and a video installation of this kit below.

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