Thread: D3 Electric Trailer brake wired-photo

Hi Andrew,
Should run 4mm2 on the Blue at min. The rest at 3mm2 should be fine.
I now run to the plugs for connection of the blue wire
as this gives the factory wiring only a small length to be used.
Remove spare wheel & cut back sheath & connect in there.

I would run the +ve & -ve direct to the battery also as per the D4 write up.
Take note there is a write up just for the D3.

Cheers

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.

Originally Posted by amaruskanic

Many thanks to Pete for the advice posted here. I successfuly installed my Hayman Reese controller over the weekend.
I did make one small change to Pete's wiring though. Instead of placing the diode on the wire running from the brake controller, I placed it upstream on the green / purple wire (ie between the CJB unit and the place where I tapped the green/purple wire). The purpose of doing this was to allow the EBC to activate the brake lights when it is operated manually by the driver whilst still providing protection to to the CJB unit.
Note: This will only turn on the trailer brake lights, as the tow vehicle lights are on a seperate circuit.

Andrew

Hi Pete,

Back in Oct 2012 you offered a detailed response to questions I had regarding the installation of a Tekonshsa P3 EBC in my 2008/2009 RRS. In fact, I didn't do the install at the time because the caravan deal fell through. But have now bought a van and I have to get the EBC installed quickly so I can go to Melbourne to pick it up next week. I have 2 questions this time.

The first concerns the placement of the diode. I will splice it into the green-purple wire with the cathode end pointing back to the EBC (per Andrew's suggestion). But, can you advise (referencing your photo) whether it is located above or below the junction of the red wire and the green-purple wire? In other words, how do I identify which end of the green-purple wire goes to the CJB, or is it obvious once the loom is exposed?

Regarding the blue connection to the brown wire going to pin-5 of 12S socket is it feasible to take the blue (heavier) wire all the way to the socket?

Thanks
John ...