Thread: 12 pin plug installed but have a question

Still hunting

I suspect I will have to talk to the guy to find out what he did. What he did may be correct,

In saying that keep in mind I have had a new 12pin brake socket installed. He may have just disconnected the round wires and ran them to the new plug - which is OK as my round plug is very difficult to get at.

If he did that then I can't understand why he had to alter anything in the left panel (as shown in my original pic).

Another question what is the function of the blue wire from the brake controller.

Richard

Originally Posted by LRD414

Pin 5 is the RH tail light in Europe. They have left & right as separate wires.
In Australia pin 5 is the trailer brakes.
This is why you see the brown wire to pin 5 is cut and the blue wire from the brake controller is spliced to it.

Note that the diagram shown here is a modified version of the factory wiring diagram with the brake controller and its wires added, so this is how it all should look when finished. Except yours has been further changed due to the 12 pin plug.

Regards,
Scott

Scott,
Thanks for all the info. My son gave me a hand to do some testing today and have an idea what has happened. It is not a pretty picture.

First
I believe the new 12 pin plug works as using the P3 i can send power to pin 5. I just remembered I have one more test to do.
Also the old round plug plug mostly works as well with a few bad exceptions.



It appears he has tapped into the the wires for the new plug just near between the old round plug and left hand side

The problems.

1. The loose brown wire in my picture is not connected to anything (it used to go to pin 5 as per the wiring diagram)
2. He has cut the light blue fog light cable and connected it to the dark blue from the brake controller. This has left a few very interesting issues

When I put power via the brake controller it now goes to pin 5 on the new 12 pin plug and pin2 on the old 7 pin round

Nothing goes to PIN 5 of the old 5 pin round

When he cut the old light blue fog cable he left one end exposed as you can see in the bottom left hand corner of my pic. Well if I turn on my rear fog light the wire is live

3. The wiring around where he taped in is just tapped. I would have liked some of that plastic conduit as that area cops a lot water, stones etc.

My son has stuck tape over the dodgy areas to highlight the problem

One more question: is there a problem have both the 7 pin and 12 pin plugs active.??

Richard

A bit of a clarification. I said the loose brown wire is not connected to anything, not entirely true as it is connected to pin 5 on the 7 pin round but has not power source as mentioned above.

RIchard