TRAILERS - ANHAENGERS - AANHANGWAGENS - REMORQUES - VANS - REMOLQUES - REBOQUES - RIMORCHIO

| Colour | 12N (Normal) Wiring for Lighting. |
Pin | 12S (Suplimentary) Wiring for Appliances. |
| Yellow | Left Hand Direction Indicator | 1 | Reverse Light and/or Reverse Brake System |
| Blue | Rear Fog Lamp | 2 | Auxillary/Split Battery Charging |
| White | EARTH | 3 | EARTH |
| Green | Right Hand Direction Indicator | 4 | Auxiliary Power from Car Battery |
| Brown | Right Hand Tail/Side & Number Plate | 5 | Warning Light with Common Return |
| Red | Stop | 6 | Refrigerator Power |
| Black | Left Hand Tail/Side | 7 | Spare |
The connection to Pins 2 (Auxiliary Battery Charging) and 6 (Refrigerator) must be controlled by a Relay Circuit so that power is only supplied with the engine running. This is to prevent current being drawn from the Caravan/Trailer battery (if fitted) during engine starting.