Why does my trailer lights have 5 wires?

A trailer with a 5-wire harness has connections for marker, brake and signal lights as well as an electric braking system. By reducing a 5-wire to a 4-wire you eliminate the connection for the trailer’s brakes.

What color wire goes where on a 7 pin trailer plug?

What is the Color Code for 7-Way Trailer Wiring?

  1. Green: Right turn/brake light.
  2. Yellow: Left turn/brake light.
  3. Brown: Tail/running lights.
  4. White: Ground wire.
  5. Blue: Brake controller output.
  6. Black: Battery hot lead.
  7. Purple: Reverse lights.

What is the blue wire on a 5 pin trailer plug?

The blue wire will connect to the reverse light circuit on the tow vehicle, but it will also send a signal to disengage the brake actuator on the trailer when you put your vehicle in reverse. So when you are in reverse, the trailer brakes will not be engaged.

What is the black wire on a 7 pin trailer plug?

The black wire of the Hopkins 7-Way Molded Trailer Wire Connector # HM20048 carries the 12 volt accessory circuit. This is the circuit that will typically power interior lights or charge a trailer’s battery.

What are the colors for trailer wires?

Trailer Wiring Colors

  • Brown wire to the tail or parking lights.
  • Green wire to right turn signal/brake light.
  • Yellow wire to the left turn signal/brake light.
  • White wire to common or chassis ground.

How do you wire a 4 wire trailer to a 5-wire?

Rewire the Trailer

  1. Cut the 5-wire harness off the trailer’s tongue leaving as much wire as possible.
  2. Attach the 4-wire harness’s green wire to the trailer’s green wire with a butt connector.
  3. Connect the yellow, white and brown wires of the harness to the like-colored wires on the trailer with butt connectors.

What is the difference between a 6 pin and 7 pin trailer connector?

Many different harness types are used to connect tow vehicles’ power sources to the electrical wiring on trailers. The difference between a 6-pin system and a 7-pin is that the 7-pin has a connection for backup lights. What systems are required by law for your trailer depends on where you live.

What is a 7 pin trailer plug?

The 7-Way Trailer Plug is around 2″ diameter connector that allows an additional pin for an auxiliary 12-volt power or backup lights. It is usually used for towing a heavy-duty landscaping trailer, car trailer, boat trailer, horse trailer, travel trailer, construction trailer, and larger trailers.

What is a 7 pole trailer connector?

This standard, RV-style, 7-pole connector provides a secure connection between your trailer and tow vehicle. Black plastic construction prevents rusting, enhances appearance and makes plug removal a snap.

What are the 7 pin connectors?

Light vehicles, common connector types 7-pin round blade connector (SAE J2863) This is common for RVs and other large trailers which have additional loads beyond the basic for tail lights and brake/turn signals. 6-pin round connector. This contact occurs on medium duty trailers that have both reverse lights and electric brakes. Flat 5-pin connector. Flat 4-pin connector.