Trailer Light Wire Colours

By | August 1, 2022



The colours for trailer light wiring are an important part of keeping safe on the roads. Knowing which colour is which can be a lifesaver when you’re dealing with a tricky wiring problem. It’s important to understand what each colour of wire does and whether it’s being used for the correct purpose. In this article, we’re going to discuss the various trailer light wire colours you may come across and provide some guidance on which should be used.

The trailer lights themselves come in different shapes, sizes and colours. The type, size, and colour all depend on the application and how the trailer will be used. Generally, the tow vehicle’s wiring harness should be matched to the trailer’s wiring system as closely as possible. This will ensure that all connectors and terminals are compatible.

When it comes to the colours used in trailer light wiring, there are typically two main types: direct current (DC) and alternating current (AC). DC wiring systems use black, white and green wires. White is generally used for the ground wire and black for the hot wire. Green is for the left turn signal and yellow for the right turn signal. AC wiring systems require white, blue and red wires. White wires are used for the ground wire and blue for the hot wire. Red wires signify the left turn signal and green for the right turn signal.

Trailer light wiring can be a complex subject, but understanding the basics is key to staying safe on the road. Make sure you have a good understanding of each colour used in trailer light wiring and always use them correctly in order to ensure your safety and the safety of those around you.


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