Thread: Discovery 3 LED trailer lights

Thanks mods for keeping this thread up.
I must say, it wasn't til page 14, the penny dropped and the logic why I needed a relay, as I only wanted to modify my trailer, not the car.
I first put the resistors on each indicators which brought the dash trailer indicator up on left and right motions. Only still to get that flicky indicators flash when car is on.
The pulse is that quick, it has enough voltage rise to trigger the light emitting diode (LED).
With the relay in each right and left circuit, that pulse has not got enough voltage rise to energise a magnet coil. Thus, contacts that supply voltage to the LED dont close.
Turn the indicator ON, the magnetic coil energises closing relay contact. Magic LED works. With the resistor in parallel with the coil, my dash green tailor indicator works.
Only assuming that this tells the car electronics that a trailer is connected and transmission remapping takes place and the other stuff.
Cheers all for your inputs over the years on this one.
Has been a good read and debate.
Bruce

What a load of stuffing about just to tow a trailer. I want to hire a caravan for use with my D3, does and all on one off the shelf solution exist yet?

Originally Posted by matpoli

I want to hire a caravan for use with my D3, does and all on one off the shelf solution exist yet?

Plug-and-play solution for lights has been around for ages:
Linear Electronic Design | Buy Now

However a caravan may also require extras such as electric brakes, on-board fridge and house batteries. This will obviously depend on the van.

Cheers,
Scott

Originally Posted by LRD414

Plug-and-play solution for lights has been around for ages:
Linear Electronic Design | Buy Now

However a caravan may also require extras such as electric brakes, on-board fridge and house batteries. This will obviously depend on the van.

Cheers,
Scott

Thanks mate, so expensive.

I've purchased a second had Liner Electronic LED unit from the forum and would like to hard wire it to my D4.

Has anyone got the installation instructions to be able to do this please?

As long as its the version with the switch
In the PS rear is the loom for the trailer..
Trace the Left and Right Indicator wires to the plug and wire in behind that panel in the cargo area.

Originally Posted by Tombie

As long as its the version with the switch
In the PS rear is the loom for the trailer..
Trace the Left and Right Indicator wires to the plug and wire in behind that panel in the cargo area.

It's not the version with a switch. I was considering removing the plugs on either end and hard wiring it to the car as well as putting a switch on the earth. Is this still possible given I've got the version that has plugs on both ends?

Do I only need to wire the L and R indicator wires only or all of the wires?

Originally Posted by Colin Pedersen

Hi all,
Here’s a diagram of the basic wiring to stop the pulsing on a LED trailer.
Simple and easy to make using either crimp connectors, soldering or fitting into a transportable box if needed.

Hi there could someone clarify the schematic wrt to relay terminal numbers
The circle that says "Plug" is that coming in from car?
The output from the relay the bit that goes from each relay to the LED light.. I assume thats out?
Just want to make sure I dont blow anything up
Thanks
Nick