Trailer connectors in Australia

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AUS Overview
Symbol guide
Example Description
TrailerConnectorSocket.svg
Socket
TrailerConnectorPin.svg
Pin

A number of standards prevail in Australia for trailer connectors, the electrical connectors between vehicles and the trailers they tow that provide a means of control for the trailers.

The Australian market uses its own version of especially the European contacts, but also completely own contacts.[1][2]

The only connector used on the Australian market that is fully ISO standard conformant is the 7-pin ABS / EBS plug.

Since Australia has vehicles from both the North American market and the European market there is a mixture of 12V and 24V.

7-pin trailer connector (AS 4735) for heavy duty vehicles[edit]

7-pin trailer connector (AS 4735) for heavy duty vehicles (Towing vehicle side)

This connector is based on both SAE J560 and ISO 1185 and is providing either 12V, 7 x 40A or 24V, 7 x 20A. The voltage varies from vehicle to vehicle.

# DIN Signal Color Rec. cross-section Notes
mm² AWG
1 31 Ground (-) White 10 8
2 58 or 58L Clearance lamps/Outline marker lamps, Side marker lamps, identification lamps Black 4 12
3 L Left Turn Signal Yellow 4 12
4 54 Stop lamps Red 6 10
5 R Right Turn Signal Green 4 12
6 58 or 58R Tail lamps, registration plate lamp Brown 4 12
7 Reversing lamps or +12V via ignition lock Blue 6 10

Round trailer connectors Type 1[edit]

Round trailer connectors Type 1

These connectors are based on ISO 1724 in 5-pin and 7-pin versions, but with some difference in the wiring.

Round 7-pin trailer connector Type 1 (AS 2513)[edit]

Round 7-pin trailer connector Type 1, Australian Standard 2513

This contact has chosen to use one of the connections of the ISO 1724 is used for position light to electric brakes (Pin 5, 58R), which means that if you connect a trailer with electric brakes to a towing vehicle wired according to ISO 1724 and turn on the position lights the trailer will be braking. Pin 2 (54G) is in the Australian wiring standard the reversing light, which is a minor problem.

# DIN Signal Color Rec. cross-section Notes
mm² AWG
1 L Left Turn Signal Yellow 1.5 15
2 Reversing lamps, control current to block surge brakes when reversing. Black 1.5 15
3 31 Ground connected to chassis White 2.5 13
4 R Right Turn Signal Green 1.5 15
5 Electric brake control Blue 1.5 15
6 54 Stop lamps Red 1.5 15
7 58 Tail lamps, clearance lamps/outline marker lamps and registration plate lamp left side Brown 1.5 15

Round 5-pin trailer connector Type 1[edit]

Round 5-pin trailer connector Type 1

This connector is replaced by the 7-pin (AS 2513), but can be found on older vehicles. Note that pins 1 and 4 missing. Pin placement is identical to the 7-pin ISO 1724 with the absence of these pins. This means that you can connect a trailer with a 5-pin connector to a 7-pin socket or the other way around, but since the pins are wired in a different way the result may be far from what was expected.

# DIN Signal Color Rec. cross-section Notes
mm² AWG
2 L Left Turn Signal Yellow 1.5 15
3 31 Ground White 2.5 13
5 R Right Turn Signal Green 1.5 15
6 54 Stop lamps Red 1.5 15
7 58 Tail lamps, clearance lamps/outline marker lamps and registration plate lamp Brown 1.5 15

Round trailer socket type 2[edit]

AUS Round trailer socket type 2

Round 7 pin trailer connector type 2[edit]

Round 7 pin trailer connector type 2
# DIN Signal Color Rec. cross-section Notes
mm² AWG
1 L Left Turn Signal Yellow 1.5 15
2 Reversing lamps Pink 1.5 15
3 31 Ground White 2.5 13
4 R Right Turn Signal Green 1.5 15
5 Electric brake control Blue 1.5 15
6 54 Stop lamps Red 1.5 15
7 58 Tail lamps, clearance lamps/outline marker lamps and registration plate lamp Brown 1.5 15

Round 6-pin trailer connector type 2[edit]

Round 6-pin trailer connector type 2
# DIN Signal Color Rec. cross-section Notes
mm² AWG
1 58 Tail lamps, clearance lamps/outline marker lamps and registration plate lamp right side Brown 1.5 15
2 L Left Turn Signal Yellow 1.5 15
3 R Right Turn Signal Green 1.5 15
4 54 Stop lamps Red 1.5 15
5 Electric brake control Blue 1.5 15
6 31 Ground (-) for pin 1 - 8 White 2.5 13

Rectangular trailer connectors Type 3[edit]

Rectangular trailer connectors Type 3
# DIN Signal Color Rec. cross-section Notes
mm² AWG
1 L Left Turn Signal Yellow 1.5 15
2 Reversing lamps, control current to block surge brakes when reversing. Black 1.5 15
3 31 Ground White 2.5 13
4 R Right Turn Signal Green 1.5 15
5 Electric brake control Blue 1.5 15
6 54 Stop lamps Red 1.5 15
7 58 Tail lamps, clearance lamps/outline marker lamps and registration plate lamp Brown 1.5 15
8 30 +12V permanent Orange 2.5 13
9 15 +12V via ignition lock Pink 2.5 13
10 31 Ground White 2.5 13
11 Rear fog lamps Grey 1.5 15
12 Spare Purple 2.5 13

The image of the 7 and 12 pin flat plugs are from the cable entry view (and possibly the images of the round connectors too). Please see reference [2] (VSB1 section 14) for front image. Reference [1] Narva wiring diagrams also have the diagrams cable entry view. If you want the front view images in colour see [3]

References[edit]