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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





 


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