Wiring a Tow Vehicle to Tow a Dinghy

To tow a dinghy, the tow vehicle must be able to provide basic lighting functions for the dinghy. If there is not already a functioning trailer connector on the rear of the vehicle, one must be added.

• How you wire your tow vehicle depends on the type of lighting system you have on your tow vehicle.
  • Combined system
    • If you have a combined system, your vehicle will carry brake and turn signals on the same wire
    • See "Wiring a Combined Tow Vehicle" below for instructions on installing a basic 4-way trailer connector
  • Separate system
    • Separate systems carry the brake and turn signals on two separate wires, often with the turn signal behind an amber lens
    • See "Wiring a Separate Tow Vehicle" below for instructions on installing a basic 4-way trailer connector

Wiring a Tow Vehicle with Combined Tailight Wiring System

To supply the appropriate circuits for powering the dinghy's tail lights, you need to install a 4-way connector on the tow vehicle that can provide the running light, right turn and brake, and left turn and brake signals

1. You can use a universal wiring kit like 4-Pole Hardwire Kit Including Circuit Tester, part #18252, to provide a 4-way connecter on the rear of the tow vehicle
2. Procedure
   1. Ground the white wire from the wiring harness to a clean, metal surface on the vehicle frame
   2. Using a circuit tester, locate the tow vehicle's factory wires that carry the running light, right turn and brake, and left turn and brake signals
      1. Connect the brown wire to the factory running light circuit
      2. Connect the yellow wire to the factory left turn and brake circuit
      3. Connect the green wire to the factory right turn and brake circuit
   3. Once the wiring is complete, test each pole on the 4-way connector to see if it shows current when the appropriate function is activated
   4. Mount the 4-way on the rear of the tow vehicle in a safe, easily accessible mounting location

Wiring a Tow Vehicle with a Separate Tail Light Wiring System

Install a converter on the tow vehicle to convert its 3-wire system to a 2-wire system and to provide a 4-way trailer connector

• Installation of a converter is necessary for the dinghy's tail lights to function properly while being towed
  • Converting the lights from a separate system to a combined system is recommended because it gives the tow vehicle a connector that can provide the basic light functions for towing a trailer, as well as a vehicle
• A powered, universal kit that can be used to wire most tow vehicles is the Heavy Duty Modulite Circuit Protected Vehicle Wiring Harness with Install kit, part # 119190KIT. Ensure that you follow manufacturer's instructions when installing this kit.
  • There are some cases when a non-powered converter can be used. However, if you do not have a way to determine which converter you need, the safest option for your tow vehicle will be a powered converter.
• Procedure
  1. Ground the white wire from the converter to a clean, metal surface on the tow vehicle chassis
  2. Using a circuit tester, find the factory wires that carry the brake lights, running lights and right turn and left turn signals on the tow vehicle
     • Connect the red wire from the converter to the factory wire that goes hot when the brakes are pressed
     • Connect the brown wire from the converter to the factory wire that carries the running light signal
     • Run the green wire from the converter to the right side of the vehicle, then connect the green wire to the factory wire that carries the right turn signal
     • Connect the yellow wire from the converter to the factory wire that carries the left turn signal
  3. Once the wiring is complete, test each pole on the 4-way connector to make sure that they show current when the appropriate function is activated
  4. Mount the 4-way on the rear of the tow vehicle in a safe, easily accessible location

Note: Inside the converter box, the brake light signal carried on the red wire is combined with the turn signals carried on the green and yellow wires