Australian Trailer Plug and Socket Pinout Wiring 7 pin ...
Identifying: Plug size is similar to an Australian 10c coin. Socket and plug are keyed. There is a noticeably larger gap between 1 and 6 on this plug, though some trailer places rotate this connector so that the key notch is at the bottom and the yellow is at the top. (Image from Varta). All diagrams are as viewed from the Cable Side.
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