Trailer Wiring Diagrams

Flat Trailer Plugs & Sockets

The below diagrams are for 12 pin flat & 7 pin flat trailer plug wiring and socket wiring. Below are standard NZ trailer wiring colours.

flat plug table
flat plug diagram

Small Round Trailer Plugs & Sockets

The below diagrams are for small 7 pin round & 5 pin round trailer plug & socket wiring. Below are standard NZ trailer wiring colours.

small round plug table
small round plug diagram

Large Round Trailer Plugs & Sockets

The below diagrams are for large 7 pin round & 5 pin round trailer plug and socket wiring. Below are standard NZ trailer wiring colours.

large round plug table
large round plug diagram

Trailer Lighting

  • All NZ trailers must be fitted with ADR compliant lights.
  • Rear tail lights are to be fitted on the outer extremities of the trailer to show how wide the trailer is.
  • Minimum lighting requirements for trailers is x2 red tail lights, reflectors, turn indicators and a number plate light.
  • If your vehicle lights are not visible you will also require two brake lights.
  • Trailers over 2 metres in width require marker lights or forward facing lights.