D3 Electric Trailer brake wired-photo

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Originally Posted by Aussie Jeepster

Attachment 125111
Just a query, unrelated to trailers!
If I wanted to get 12v at the rear for a merit plug fitting, could the purple wire be used for it? Is it permanent 12v?
Thanks
alan

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Having added a rear external light to mine off the cig lighter circuit and finding it's being turned off in time, I'll be doing exactly that to mine.

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Originally Posted by DiscoJeffster

Having added a rear external light to mine off the cig lighter circuit and finding it's being turned off in time, I'll be doing exactly that to mine.

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As long as its a permanent supply. I can't get into mine at present as I have the dreaded "broken cable for the upper tailgate" problem.:<(((

Hi So i'm just about to wire up my D3 to a redarc controller and happy with what wires need to attach to what. I want to run the +ve and -ve direct off the battery as a lot of you suggested. I have previously done this with my defender, but getting access to wires so much simpler there. So i have 2 questions

1. How do i get the +ve and -ve from drivers side cabin through firewall to engine bay? Any pictures would be great.
2. How do the plastic side floor panels lift? I've already broken a bracket on another panel so don't want to do the same.

And i while i'm at it I'm thinking of running an Anderson Plug from battery down and running along chassis to the tow hitch. would this be the simplest way? (I know 3 questions! [bigwhistle])

Any help appreciated.

Warning, do not attach any earth lead to the battery negative terminal. Use only the earth point on the body.

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Originally Posted by Hercules

1. How do i get the +ve and -ve from drivers side cabin through firewall to engine bay? Any pictures would be great.
2. How do the plastic side floor panels lift? I've already broken a bracket on another panel so don't want to do the same.
And i while i'm at it I'm thinking of running an Anderson Plug from battery down and running along chassis to the tow hitch. would this be the simplest way?

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You'll find all the info in this thread but not all of it on the first page:
D4 Electric Trailer Brake Wiring

Scott

thanks this has been very helpful

Can I ask a dumb question?
We will be picking up a new van in November, so I'm starting to sort out wiring etc.
The van will have the usual 12 pin flat connector.
The Disco 3 has 2 7 pin connectors.
Why can't I make up an adapter from the 2 7 pin plugs into a 12 pin plug??????
Is the 12 pin plug a unique plug to Australia, with unique wiring???
Happy to be told why this can't be done, but I just want to understand why????

You can do that and many have. There’s been a few threads specifically on diy adapter cables for 2 x 7 pin to 12 pin. Just need the required plugs and pin assignments.

Scott

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Originally Posted by sniegy

Hi all,
Earlier this week i had to wire a customers vehicle for Electric Trailer Brakes.
I took a couple of photos & this one was the best with everything in 1 shot.
I will try to explain basically as last time it wasnt to clear!!:(
Run 4 wires from the Electric trailer brake unit mounted under the steering column or where ever it is mounted to the rear of the vehilce l/h/s 1/4 panel.
WHITE wire is for earth & gets bolted to one of the terminals as u see in the photo.
BLACK wire is for power +ve & is connected to the 30amp circuit breaker & then another black wire from the circuit breaker (other side)gets connected to the thick PURPLE wire from the trailer wiring plug.
BLUE wire is for variable voltage feed to the electric brakes on your towed vehicle. This is connected to the brown wire from the fuse block. This wire is cut 30mm from the fuse block & the fuse block end is then soldered to the black wire in the fuse block(these are 2 park light circuits & we only need 1) The other end of the Brown wire goes to pin 5 which is for electric brake feed.
RED is brake light feed pick up This is connected to the Green/Purple trace wire in the trailer wiring plug.
As per LR instructions a "Diode" must be fitted & this goes between the connection of the red wire to the Green/Purple Kathode facing the electric brake unit.
**On the photo i ran out of blue wire & used another black for the blue wire connection to the brown wire.
When i receive stock of the blue i will replace photo.
Hope this helps some of the crew.:);)
If the photo is not big enough go to my gallery & view orig size.



https://www.aulro.com/afvb/images/im...014/06/987.jpg

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Hi all.....

Has anyone a link to a slightly better pic quality ?
Ìm having trouble reading the purple writing lol . It may be my Samsung phone tho

Can't wait to connect the tow pro in the D3

Cheers

Great thread, and great instructions.

I'm having one problem that I don't seem to see identified by anyone in the thread. I've identified the brown wire off the fuse block, but it does not seem to connect to pin 5 of the 12S socket. In fact, there are only 5 wires going to the 12S socket, with the socket then filled in with a resin. Two of them seem to be earths, one a battery connection, and one a switched (ignition) connection.

I also just don't know where the brown wire is meant to go to in my car. It's not particularly thick, so perhaps it is just the brake light on one side?

The fifth connection I'm guessing is either the spare, or I've seen labelled as a Reversing light?


I guess I could use one of those two if I can trace where they connect from, but I just don't understand why this one is different. Mine's a 2005 or 2006 MY (I think MY05, first registered in 2006).

Any thoughts?

Edit: It's the yellow/brown cable, connected to pin1, labelled as Reverse Light or Catch (whatever that means).

I guess I can use that for the brakes?