Thread: Discovery 3 LED trailer lights

Originally Posted by Talby

Hi Guys,

I fitted the linear electronic design module and it worked perfectly, used the in car mount version which has the switch to turn the unit on when towing (a trailer with led's) which disables the reverse sensors and allows the rest of the system to work correctly Then turn off when not towing to allow reverse sensors to operate again. You only need to connect a wire to each blinker (yellow & green) cable in the rear left compartment where the tongue is stored and the earth which has a connector already fitted ready to use a existing earth in the rear compartment, fitted the switch in the underside of the left rear indent side cover, then turn off when not towing. I could fit one in under 15 minutes very neat and solved all the problems. Did cost $265 but worked a treat and was delivered the next day. Thanks LG Fossicker for the info previously in this post.

I ordered his one yesterday for the same reason you mention. My trailer has the box, but it appears from talking to linear electronics they are vehicle specific. The current one worked perfectly on my touareg but parking sensors don't deactivate on the D4. This should fix it.

I used my D4 to tow a Jayco Eagle caravan (first time towing anything) and the lights appeared to work on the trailer but the D4 didn't recognise it and the reverse sensor would engage when in reverse. I also had an issue when turning my headlights on as the electronic brakes on the trailer would engage. I used an adaptor for a 7 pin round to 7 pin flat. Do I have multiple issues of needing a LED module and electronic brake module?

Originally Posted by misheemee

I used my D4 to tow a Jayco Eagle caravan (first time towing anything) and the lights appeared to work on the trailer but the D4 didn't recognise it and the reverse sensor would engage when in reverse. I also had an issue when turning my headlights on as the electronic brakes on the trailer would engage. I used an adaptor for a 7 pin round to 7 pin flat. Do I have multiple issues of needing a LED module and electronic brake module?

Hi there,

Have you got an electric brake controller fitted to the D4 & who fit it?

If you look at Sniegy's excellent "how to" on wiring electric brakes on a D4 you will see the light circuit in the car goes to TWO pins!
See the first photo in Sniegy's thread here ... http://www.aulro.com/afvb/d3-d4-rrs/...er-brakes.html

This is obviously what is happening to you. And yes, you have multiple issues. LED trailer lights are well covered in this section too!

Regards,

Les.

Originally Posted by outasight

Hi there,

Have you got an electric brake controller fitted to the D4 & who fit it?

If you look at Sniegy's excellent "how to" on wiring electric brakes on a D4 you will see the light circuit in the car goes to TWO pins!
See the first photo in Sniegy's thread here ... http://www.aulro.com/afvb/d3-d4-rrs/...er-brakes.html

This is obviously what is happening to you. And yes, you have multiple issues. LED trailer lights are well covered in this section too!

Regards,

Les.

No EB module installed. Didn't know what that was until watching an episode of Pat Callinan's 4X4 show. I have been through this forum and lots of info on this, great stuff. Looks like the LED module adaptor like the PulseBusta from LAB Electronics mentioned in this thread may be the way to go. I would like to think that it would fix the trailer brakes locking with headlights on.

Originally Posted by misheemee

No EB module installed. Didn't know what that was until watching an episode of Pat Callinan's 4X4 show. I have been through this forum and lots of info on this, great stuff. Looks like the LED module adaptor like the PulseBusta from LAB Electronics mentioned in this thread may be the way to go. I would like to think that it would fix the trailer brakes locking with headlights on.

No it will not fix the brakes problem! You have TWO problems.

You will still need a solution anyway for the LED problems, but you ALSO need an Electric Brake controller fitted(legally, for insurance, and just plain safety!).
Doing the wiring for the brake controller by following that thread I linked above(cruicaly cutting that wire in the first photo) WILL fix the brakes activating with the lights.

Regards,

Les.

Got it, both it is, thanks

I should have read these threads earlier.

Dot point version...bought caravan, towed with Deefer 130. Van lights filled with water and rusted out. Smart fellow fits LED to van. No problems.

Buys Disco3 and 6 months later has Redarc brake controller fitted. Cue the sensing light issue...not fixed with parallel resistors....also find van brakes lock on when headlights turned on!!!

Have Disco whilst on holidays so brakes work. Back home and converting van back to incandescents as cheaper operation ( KISS principle ).

Like I said, should have read the forum earlier.


aew849

Hi Misheeme,

I had exactly the same problem towing a jayco, the dealer did not install the brake controller correctly anw when the lights were turned on the brakes were being applied at max, the tekonsha tho picked up the problem and flagged a red warning so i had it fixed before doing any towing.

You need to get the wire snipped in the wiring loom inside the rear left tail light assembly. Once snipped all was well.

Also has anyone used the 21W resistors, I almost bought a couple from repco until I read on the pack that they can get to 170C. I needf to mount it to the inside of my can bumper which is fiberglass. How hot does it get in real use?

Cheers
Mike