Trailer wiring colours australia

RCD Safety Switch - test and tag

When it comes to trailer wiring colours in Australia, there are many different colours. Have you ever wondered what each colour represents? In this article, we will provide some insight into each wire colour, and the meaning behind each one.

12 Pin Flat Plug and Socket

While there are many different types of trailers and trailer connectors, trailer wiring colours in Australia have a set of standards that are followed. This ensures that, regardless of the type of trailer that you have, the colours of the wire will generally have the same functionality.

Flat connectors comply with Australian Standard AS4177.5-2004.

In this article, we will cover the 12 Pin Flat Plug and Socket standard, which incorporates 12 different wire colours – each one providing different functionality to different areas of the trailer.

When following the above standard, these wire colours are used:

Yellow – Left-hand turn indicator.

Black – Reversing signal.

White – Earth return. In the 12 Pin Flat Plug and Socket standard, this wire appears twice.

Green – Right-hand turn indicator.

Blue – Service brakes.

Red – Stop lamps (lights).

Brown – Rear lamps (lights), clearance and side marker lamps (lights).

Orange – Battery charger/winch.

Pink – Auxiliaries/battery lead.

Grey – Rear fog lamp (light).

Violet – Auxiliaries.

By understanding the functionality of each wire colour, you also gain a better understanding of your vehicle. For example, if you begin to experience problems with your reversing signal, you could examine the black wire on your 12 Pin Flat Plug and Socket and check for any faults.

Having said that, if you are experiencing issues with your trailer and are not sure how to resolve it, we would recommend getting in touch with a local expert who can diagnose and fix any issues you may have.

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