Great Australian Bight

Technical Tips & Details

Last Modified:
11 Nov 2013

Wiring of Trailer and Caravan Plugs - How To

Caravan/Trailer Wiring 

The following is the Standard for wiring for trailer and caravans.   Some older plugs are still around and don't always comply with this standard, Important to check that the Car and Carava/Trailers are wired Correctly.

Correct wiring is not only for comatability of other vehicles towing but also as a safety measure.

One very important fact to remember is that it is the WHITE wire is ALWAYS the earth in trailer wiring not the green or black wires.

 

12 Pin Flat Plug Socket


Flat 12 Pin Trailer Plug
Flat 12 Pin Trailer Plug
Flat 12 Pin Trailer Socket
Flat 12 Pin Trailer Socket
Pin Connection Colour
1
 Left indicator
Yellow
2  Auxiliary or reversing light
Black
3  Earth
White
4  Right indicator
Green
5  Electric brakes
Blue
6  Stop light
Red
7  Tail and registration plate
Brown

Extra Heavy Duty Row for Flat 12 Pin Plug


8

Battery Charger/Electric Winch

Orange


9

Auxiliaries, etc / battery feed / fridge

Pink


10

Earth Return

White


11
Rear Fog Lamps

Grey


12

Spare

Violet

Flat 7 Pin Plug

Flat 7 Pin Socket



 

7 Pin Flat Plug Socket
(Note this plug is compatable with 12 pin Socket)


Flat 7 Pin Trailer Socket
Flat 7 Pin Trailer Plug
Flat 7 Pin Trailer Plug
Flat 7 Pin Trailer Socket
Pin Connection Colour
1
Left indicator
Yellow
2 Auxiliary or reversing light
Black
3 Earth
White
4 Right indicator
Green
5 Electric brakes
Blue
6 Stop light
Red
7 Tail and registration plate
Brown
Flat 7 Pin Plug

Flat 7 Pin Socket



 

7 Pin Round Small Plug 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
Pin Connection Colour
1
 Left indicator
Yellow
2  Auxiliary or reversing light
Black
3  Earth
White
4  Right indicator
Green
5  Electric brakes
Blue
6  Stop light
Red
7  Tail and registration plate
Brown
Flat 7 Pin Plug

Flat 7 Pin Socket



 

Round 6 Pin Plug

Small Round 6 Pin Socket
Small Round 6 Pin Socket

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

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



 

Large 7 Pin Plug

Round Large 7 Pin Socket
Round Large 7 Pin Socket

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

Pin Connection

Colour

1  Left indicator Yellow
2  Auxiliary or reversing light Black
3  Earth White
4  Right indicator Green
5  Electric brakes Blue
6 Brake lights Red
7  Tail lights Brown
Large 7 Pin Socket
 
Round Large 7 Pin Plug
Round Large 7 Pin Plug

Large 7 Pin Plug



 

Large 5 Pin Plug

Round Large 5 Pin Socket
Round Large 5 Pin Socket

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

Pin

Connection

Colour
   
Blank
2  Left indicator
Yellow
3  Earth
White
   
Blank
5  Right indicator
Green
6 Brake lights
Red
7  Tail lights
Brown
Large 5 Pin Socket
Round Large 5 Pin Plug
Round Large 5 Pin Plug
 
Large 5 Pin Plug



 

Heavy Duty 7 Pin Round Plug

Heavy Duty 7 Pin Trailer Socket
Heavy Duty Round 7 Pin Trailer Socket
Heavy Duty Round 7 Pin Trailer Plug
Heavy Duty 7 Pin Trailer Plug
Pin Connection Colour
1
Earth return
White
2 Reverse lamp
Black
3 Left hand turn signal
Yellow
4 Stop lamps
Red
5 Right hand turn signal
Green
6 Rear, clearance and marker,side marker
Brown
7 Service Brakes
Blue
Heavy Duty 7 Pin Trailer Socket

Heavy Duty 7 Pin Trailer Plug