<span class="highlight">Accessories</span> connection in trailer plug

It is pretty well impossible to charge your van battery without an Anderson Plug or similar, the standard 7 pin connector won't carry enough current to proved high enough voltage to the Van Battery.

I have seen some people use a 12 pin and gang up 2 of the larger pins. Then add a 12 volt to 12 volt charger to the van.

G'day Bonz,
I'm no auto electrician, but my understanding is the only way to charge your camper/van battery is to run wires from the alternator to an anderson plug on the rear of your tug, then another anderson plug from the tug to the battery.

It can also be done from the seven pin plug but the wire is soooo thin that the current that is carried is as good as non existent.
Hope this helps.
Cheers
Baz

As others have said, trailer plug wires aren't a heavy enough gauge to charge a battery, you have to use a heavy wire and an anderson plug.

You are correct in that the white wire is earth but the black wire is for reverse lights if you have them fitted to your trailer.

Jon

I wonder how long it will be before one of the plug manufacturers gets around to designing an integrated plug that does carry the circuits for lights and a high current circuit for battery charging in the one unit.

I believe the wiring is to an international standard.

Thats why it as it is.

I could of course be wrong.

Most of us run the charging wire fron an Aux battery to the van batteries not from the alternator.

I have 6 B& S on mine and 8 B&S to the fridge Through 2 anderson plugs

Bonz

Check out this link

Wiring Diagrams

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Bonz

I have a 12 pin flat plug on the back of the Patrol, and I made sure that the power wire was a lot heavier than the rest, and came straight off the battery.
The earth wire also is the same type heavy wire, and goes straight back to the same battery too.

Mind you I am no genius when it comes to electrics, but I can assure you that there is only a 0.1 voltage drop to the rear plug. I just went and checked it, and waited the compllsory 2 minutes for things to equalize. 13.46 v on the second battery, and 13.45 v at the rear plug.

I am also aware that voltage and amps differ, but thinking back I seem to remember 50 or 60 amp wire being purchased.
I also do have an anderson plug at the rear of the Patrol as well, but tha twas put there so we could take the mates camper trailer, on a hunting trip, into NSW in May.
Red necks gotta heva comefort too

Cheers
Bucky