D4 Electric Trailer Brake Wiring

Yes, the diode is required for all brake controllers that can produce a voltage output on the red wire that could backfeed to the vehicle ECU (brake light output source). When you press in the button on the Redarc Tow Pro it will output 12V on the red (as well as signal to the brakes on the blue) which will turn on the trailer brake lights. The diode will also protect the ECU if something goes wrong on the red inside the brake controller.

.

Roughly how much should this job cost on a D4 for a P3 Supply and install

Had latest Red Arc controller installed in my D4 and cost $1,000 probably paid a little more but local guy did it and very good back up service.
It's with the 10 set knob controller either manual or Auto, have camper trailer just been to Flinders Rangers recently and had no trouble with braking.
rodg

Quote:

---

Originally Posted by White D4

Hi Again

I was at the dealer where we are buying our caravan from today and he told me that i will need a special adaptor box from LR that connects to the trailer plug. I apparently need this due to the fact the caravan has LED lights and without this box the van will be like dodgy Xmas tree.

I am told this box will set me bag a further $250. Funny thing is i spoke to the landy dealer i am getting the vehicle from and he doesn't know much about this.

Can you shed some light on it for me.

Cheers
Paul

---

Hi Paul I had to buy a box as well for my camper trailer paid $185.00 to a company in SA because camper trailer had LED light and not globes, a common problem as the computer is looking for a certain load on the trailer plug so there for it doesn't comput that there is a trailer connected.

Hi, this is my first post sorry if the reply is to someone elses post.
I am mid way through the install of the tow pro elite . My first suggestion is when you pop the internal scuff plates trims OK the floor - Remove the clips that hold them in. They are a nightmare to recover. Lr charge $1.70 each.
So my question is when installing the switch assembly into the light binnacle, How did remove the dashboard trim behind?

Thanks

Morning Team,

Will this diode be suitable in the D3?

https://www.aulro.com/afvb/images/im...016/08/381.jpg

Cheers,

Salty

Howdy Salty,

The 3A diodes would be fine for most application (loads up to 36W). I originally installed a 3A diode that was fine with my van (LED lights) but died with my crappy box trailer. When I did the math the box trailer brake light globes were pulling a little over 4A. So I bought some 6A diodes from Jaycar... had to buy 10... have 2 left. If you PM me your address I'm happy to send you one.

Gordon

You're a ledgend Gordon,

Cheers

Thanks to all for the information on this thread.
However, we have been unsuccessful in getting a RedArc TowPro Elite to work on our new MY16 D4 and caravan.
ARB had trouble finding relevant information so I provided print outs of the discussions on this thread. They were impressed with the quality of the posts. After completion, ARB tested their work using a 'trailer board' and told me all was fine. However, the brake controller does not work with our caravan - the dial on the dashboard does not show the correct colours, the caravan brake lights do not glow and there is no braking effect.
The Prodigy brake controller on our recent D3 continues to work with the van.
A LED resister unit is fitted to the van.
Is there a significant difference in the wiring between a D3 and D4? Could the van be at fault (although it continues to work with the D3)?
Any help would be appreciated.
regards
David

David, perhaps start by testing the pins of the trailer plug on the D4.
No lights and no brake controller signal suggests it's not just an issue with the Tow Pro.
Do the caravan indicators work with the D4?

Cheers,
Scott

Thanks Scott
Yes, a mate tested the black round plug on the D4 and all seemed correct.
I forgot to mention that, when only the round plug is connected, the caravan blinkers flash 'opposite side' to the car blinkers, but when the gray Anderson plug is also connected, the van blinkers work correctly.
regards
David