Additional Information

In Australia, we have one plug shape, colloquially called the “HEAVY DUTY” or the EURO plug and its mating socket, with at least 3 wiring options:

• ISO 1185: international standard for European model trucks (i.e. typically associated with 24v trucks)
  • includes auxilliary/fog lamps
  • separates left and right marker lights

Please note the difference between the ISO 1185 above and these below:

• AS 4735: 2019 Industry change for all NEW MODEL VEHICLES across Australia
  • includes reverse
  • separate left and right marker lights
• AUS INDUSTRY WIRING:
  • includes reverse
  • joins left and right marker lights onto one conductor
  • one spare conductor
• SAE J560: American standard for American trucks (i.e. typically associated with 12v trucks)
  • quite different
  • used to power ABS on American trailers
  • (not used in AUS)

Unfortunately, you cannot tell how a truck is wired simply by the shape of the plug. You should ask your vehicle manufacturer what wiring diagram your plug or socket is wired to.