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Technical Tips & Details

Last Modified:
13 Aug 2012

Wiring of Trailer and Caravan Plugs - How To

Caravan/Trailer Wiring 

The following is the Standard for wiring 5,  and 7 pin plugs for trailer and caravans.   Some older plugs are still around and dont always comply with this standard

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.

These tables apply to all types of trailer plugs used in Australia. 

 

7 Pin Plug

5 Pin Plug

Pin Connection Colour Pin Connection Colour
1

 Left indicator
Yellow 2  Left indicator Yellow
2  Auxiliary or reversing light

Black
5  Right indicator Green
3  Earth

White
6  Stop light Red
4  Right indicator

Green
7  Tail and registration plate Brown
5  Electric brakes

Blue
3  Earth White
6  Stop light

Red
 
7  Tail and registration plate

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
Plugs
Flat 12 Pin Trailer Socket
Flat 12 Pin Trailer Plug
Flat 12 Pin Trailer Plug
Flat 12 Pin Trailer Socket
Flat 7 Pin Trailer Socket
Flat 7 Pin Trailer Plug
Note this plug is compatable with 12 pin Socket
Flat 7 Pin Trailer Plug
Flat 7 Pin Trailer 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


 




 


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