Trailer Wiring standard

7 Pin Plug

5 Pin Plug

Pin Connection Colour Pin Connection Colour
1  Left indicator

Yellow

1  Left indicator Yellow
2  Auxiliary or reversing light

Black

2  Right indicator Green
3  Earth

White

3  Stop light Red
4  Right indicator

Green

4  Tail Brown
5  Electric brakes

Blue

5  Earth White
6  Stop light

Red

7  Tail

Brown


Extra for Flat 12 Pin Plug

Battery Charger/Electric Winch

8

Orange

Auxiliaries, etc / battery feed / fridge

9

Pink

Earth Return

10

White

Rear Fog Lamps

11

Grey

Spare

12

Violet

Sockets
Flat 12 Pin Trailer Socket
Flat 12 Pin Trailer Socket
Flat 12 Pin Trailer Plug
Flat 12 Pin Trailer Plug

Flat 7 Pin Trailer Socket
Flat 7 Pin Trailer Socket
Flat 7 Pin Trailer Plug
Flat 7 Pin Trailer Plug
*Note this plug is compatable with 12 pin Socket
Small Round 7 Pin Trailer Socket
Small Round 7 Pin Trailer Socket
Small Round 7 Pin Trailer Plug
Small Round 7 Pin Trailer Plug

 


Below is the Small round 6 pin plug which was popular in NSW.

Round 6 Pin Plug

Pin Connection Colour
1
Larger Pin
Tail and registration plate

Brown

2
 Left indicator
Yellow
3
Right indicator

Green

4
Stop light

Red

5
Electric brakes

Blue

6
Earth

White

 

Small Round 6 Pin Socket
Small Round 6 Pin Socket
Small Round 6 Pin Plug
Small Round 6 Pin Plug

Below is the large round plug which are popular in Vic.

Large 5 and 7 Pin Plug

7 Pin

Connection

5 Pin
Yellow  Left indicator

Yellow

Black  Auxiliary or reversing light

 

White  Earth

White

Green  Right indicator

Green

Blue  Electric brakes

 

Red  Brake lights

Red

Brown  Tail lights

Brown

Round Large 7 Pin Socket
Round Large 7 Pin Socket
Round Large 7 Pin Plug
Round Large 7 Pin Plug
Round Large 5 Pin Socket
Round Large 5 Pin Socket
Round Large 5 Pin Plug
Round Large 5 Pin Plug