Recommended 7-Way Trailer Connector Wiring for a 2001 Volvo V70  

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Expert Reply:

To install a matching 7-Way connector on your 2001 Volvo V70 wagon, you would first need to install a 4-Way connector.

I would recommend using a powered taillight converter kit # C59496, which includes all necessary items to install the 4-Way connector on your vehicle, and features a circuit protected powered converter to protect your vehicle wiring from overload.

You would need to use the included circuit tester to test the wires behind your vehicle tail lights for function. I would have a friend sit in the cab and press the brake pedal or engage the turn signals as you test each wire behind your tail light. Once you have determined which wire is performing which function, you would connect the wires from the converter accordingly.

The four basic wire functions for the wires coming from the black converter box would be:

Green: Right turn and brake lights.
Yellow: Left turn and brake lights.
Brown: Running lights.
White: Ground wire. Connect this wire to a good, clean metal area on your vehicle frame.

You will also see a thicker red wire coming from the converter box. You would run this wire, using the included wire bundle, and connect it to the vehicle positive battery terminal, with the included fuse between.

If your trailer is equipped with a 7-Way connector, it might equipped with electric trailer brakes. If you do find that this is the case, please let me know and I would be glad to suggest any additional parts you may need.

To convert your 4-Way connector to a 7-Way, I would recommend using the 4-Way to 7-Way adapter # 37185. To install the adapter, you would simply plug the 4-Way connectors together. You would be able to tie up all additional wires except the white ground wire, which would be connected to the vehicle frame.

I have included a link to some additional information that should be helpful.

expert reply by: Sarah L

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