Trailer Wiring Diagrams Feedback

l would take that site to task as well Dunc as it has electric brakes on Pin 7

when it is accepted practice here is it is always PIN 5 as per here

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or here

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Graham, "Think a bit more research might be in order."

I think it's about time Australian Standards stepped in!

Dont see that they need to It is quite plain in the diagrams I posted and is

generally accepted that Pin 2 is used by the Caravan industry for AUX for

cheapness reasons.

Most vans dont have reversing lights so doesnt matter.

However the wiring is far too light for what its used for..

My van had a 12 pin plug on it but I prefer the larger 7 pin as it gives much larger contact areas for the pins

I think the poster may have been actually trying to post feedback to an

subject in the "Articles "section but unfortunately revealed a lack of knowledge

in the forum.

I find pin 2 is used to keep the small battery charged that powers the breakaway brake system & the wiring is capable of doing this as the battery is usualy only 7Ah 12V. Daryl

This thread raised a number of valid points about the use of pin #2.
When the cost cutting approaches of the caravan/trailer industry and car manuafacturers/dealers clash the results can be "interesting".
I have a Toyota Prado with 7-pin round wired by the dealer with reversing light on pin #2. I purchased a horse float with brerak-away braking system for whcih the manuafacturer used pin #2 for the battery charge pin.

Clearly some modification was going to required unless the battery was only charging when in reverse! ;-)

It gets worse... it appears that if the Toyota senses +12V on the Reversing lead when it's not in reverse gear, then the engine management computer figures that there is a major problem with the auto trans and goes into "limp home" operation remaining in a low gear only for you to get to the nearest Toyoata service centre.

Personally I kept pin #2 for reversing and wired an Anderson plug for the battery charging.