Thread: what wiring standard do MY14 D4 trailer sockets comply.

The lge black 7 pin socket is wired for Australia ( the N socket ) The white (S ) socket is wired for European caravan accessory towing. I could not find an S plug, but they are easily made if you want to use the S plug for your van. If you cannot find one, buy a 7 pin socket and Plug. Swap the centre pin from the socket to the plug, and presto you have an S plug.

If you want to use the white S socket ....................

From memory, the centre of the S plug is the earth return, and there are two power circuits. One is constant 12volt, and the other is ignition controlled. A minute with a multi meter and you will identify them. I understand both 12 volt circuits are fuse controlled at 30 amp ( thanks Gordon )

The only deficiency I found was the 7 pin plug can only take about a 15amp wire. I might have a scout around and see if a different brand has a better capacity.

At least they now have the correct wiring.

The white plug is ISO 3732


Is the reversing lamps at pin 2 or is it still the fog lamps. I know that on my MY12 I get the trailer reversing lamps by turning on the rear fog lamps.

Anyone come across the trailer connection being DOA. I bought a round to flat converter for Supercheap Auto and connected my neighbor's caravan up and got no lights on the van at all. Had hazard lights, headlights on and the engine running. car's only a couple of months old

Originally Posted by Lotz-A-Landies

At least they now have the correct wiring.

The white plug is ISO 3732


Is the reversing lamps at pin 2 or is it still the fog lamps. I know that on my MY12 I get the trailer reversing lamps by turning on the rear fog lamps.

Pin #2 is still fog lights.
The wiring follows ISO 1724.
Still compliant for Australia.

Originally Posted by sniegy

Pin #2 is still fog lights.
The wiring follows ISO 1724.
Still compliant for Australia.

It can't be compliant because if pin #2 is wired for rear fog lamps and is connected to a trailer wired for AS2513 with reversing lamps, it means you can turn on white lights at the rear from the drivers position. Totally illegal.

And your electric brakes will lock on when you turn the lights on (LH tail-light on brakes pin)

Originally Posted by Meken

And your electric brakes will lock on when you turn the lights on (LH tail-light on brakes pin)

Not on mine, but only because it now has an after-market electric brake controller. It is however why I was asking if the 2014 D4 is still not compliant with ADR42/04

Originally Posted by ADR 42/04

9.2.1.Except for motor vehicles over 3.5 tonnes ‘GVM’ and trailers over 3.5 tonnes ‘ATM’, the electrical connectors between motor vehicles and trailers, for the purpose of operating the prescribed vehicle lighting and signalling must comply with Australian Standard 2513 – 1982 “Electrical Connections for Trailer Vehicles”. Motor vehicles over 3.5 tonnes ‘GVM’ and trailers over 3.5 tonnes ‘ATM’ may use electrical connectors complying with International Standards Organisation ISO 1185 – 1997 or Society of Automotive Engineers SAE J 560 – 1998 standards for electrical connectors between towing vehicles and trailers as alternative standards.

TABLE 1.1 CIRCUITS AND IDENTIFICATION
7-pin connector

• Contact No. Circuit Circuit conductor colour
• 1 Left-hand turn Yellow
• 2 Reversing signal Black
• 3 Earth return White
• 4 Right-hand turn Green
• 5 Service Brakes Blue
• 6 Stop lamps Red
• 7 Rear lamps, clearance and side marker lamps Brown

AFAIK the GVM of a D4 is not over 3.5 Tonne and the ATM of a trailer most certainly is not over 3.5 Tonne.

I don't understand why pin 5 is such a problem. You should not be towing a trailer with electric brakes without a brake controller present and if a controller is installed the wiring should be sorted out correctly so pin 5 goes to the brakes. Do people just plug their trailers in and think that they have brakes without a brake controller??

Are people fitting brake controllers without wiring them properly? Surely if there is a wire going to pin 5 already you wouldn't just add another one and hope for the best, without at least disconnecting the one that is there already?

Interestingly, I was in Barbagellos getting my car serviced a couple of years ago and someone was complaining about his trailer brakes going on when he turned on the lights. I had just read the FAQ's on this site and knew about the pin 5 issue so I was able to tell them what was going on. The service person that he was speaking to had no idea why that would happen until I told her!

Bob