Thread: D4 Electric Trailer Brake Wiring

I like the location of the controller in the power socket area. Can anyone advise how to get access to this area. Been looking at videos of Console removal & looks easy until one tries to "Lift it up" I did not realise it weighs so much - or is it held down with more than the stated 2 screws.
Any guidance would be appreciated.
MY16 D4

Here's another solution to mounting the tow pro elite control box under the dash.

There is a metal bracket that holds some sort of ECU/control box and the cables associated with it. All I did was simply remove the clips holdings the cables so that they could moved out of the way and then used the various holes already in the bracket to bolt the tow pro box to. So far, it seems to work and is pretty secure.

IMG_20190808_164548.jpgIMG_20190808_164515.jpg

Hi
I recently completed my TowPro Elite install.

• I ran the cables to the back of the car on the left (passenger) side in a flexible conduit. The conduit runs in the cavity with all the existing cable loom.
• The controller unit sits in front of the firewall in the passenger side footwell. I made up a stainless steel plate and mounted the controller unit on it. The plate with controller itself is mounted on the same body brackets which the the Fan Blower is mounted on. I drilled a hole in the stainless steel plate, taken the bolt out of the fan blower mounting point and wedged the stainless steel plate in between the frame and the fan mounting bracket. Hopefully the photos are self explanatory.
• The remote head assembly is installed in the right centre console powerpoint hole
• I took a 6mm cable from the battery and ran it through the wiring loom grommet behind the battery to pop out in the passenger footwell.
• The 30Amp Fuse is mounted on the brackets of the fan blower (next to all the other fuses in the CJ and connected to the 6mm cable from the battery.

I hope it all makes sense.

Photos in my dropbox link here.

Hi guys,

I have installed a Redarc Tow Pro Elite to my 2016 Disco.
I think I have installed it as per drawings but it appears that when I turn on my lights, the brakes are activated as well.

Is the diode required on late model vehicles?
Could this be the problem?IMG_4499.jpg

Thanks
Darren

Nothing to do with the diode. Sounds like you didn’t cut the brown wire and it’s still linked in with the light circuit as a result.

Scott

Originally Posted by LRD414

Nothing to do with the diode. Sounds like you didn’t cut the brown wire and it’s still linked in with the light circuit as a result.

Scott

Thanks Scott,

check out the picture I attached.
the brown wire is cut so don’t think that’s the fault.
any suggestions would be much appreciated .

cheers
darren

Originally Posted by dwaters

Hi guys,

I have installed a Redarc Tow Pro Elite to my 2016 Disco.
I think I have installed it as per drawings but it appears that when I turn on my lights, the brakes are activated as well.

Is the diode required on late model vehicles?
Could this be the problem?

Thanks
Darren

Hi Darren,
From what I can see your wiring looks correct and the diode is in the correct place and orientation. The diode isn’t the problem and it is required, it is simply a safety device to stop erroneous signals from the electronic trailer brake unit feeding back to the central junction box.
It appears you ran red cables for both the sense wire (red) and feed wire (blue), any chance you accidentally connected them the wrong way around at the Tow pro unit?
The wires should be connected as follows.

Cheers
Dean

Thanks Dean,

Yes I did think this but if they were crossed over, the brakes would not work at all I would have thought.
I have read that the diode is not required in some posts and I have also seen it wired direct in line so I am considering doing giving these options a try.
I will double check I have them around the right way first.Wiring Schematic.JPGD4 brakes.jpg
As you can see from a image I found on this forum, it appears the diode is wired in a different location compared to the wiring schematic.
I am confused...........

Thanks
Darren

Originally Posted by Tankmat

Hi Darren,
From what I can see your wiring looks correct and the diode is in the correct place and orientation. The diode isn’t the problem and it is required, it is simply a safety device to stop erroneous signals from the electronic trailer brake unit feeding back to the central junction box.
It appears you ran red cables for both the sense wire (red) and feed wire (blue), any chance you accidentally connected them the wrong way around at the Tow pro unit?
The wires should be connected as follows.

Cheers
Dean