Trailer Light issues!!

[TREGGA]

Hi, think this has been covered before but: Connected my boat trailer to my new V6 TDI Touareg and the lights flickered (lcd's) so I connected to my box trailer and all worked except blinkers come on for Brake lights, (both trailers worked fine on other cars) any suggestions??

[Transporter]

If you bought genuine tow bar take it back to the dealer and let them sort it out, it shouldn't take too long. If you try to fix it and than go back to the dealer they could blame it on you.

[TREGGA]

Contacted dealer he said it's normal for blinkers to come on with brake lights, this a european thing and I need a device to increase the current to the trailer which costs $250, has anyone else encountered this?

[Transporter]

It doesn't sound right.
That would be when braking suddenly in emergency, than the indicator lights come on (on some cars) to warn other drivers but I don't think that it applies to trailer and under normal braking. Try to ask another dealer or ask people who fit towbars.

[wrigley_gs]

Trailer light issue

Trailer LED Lights & Electric trailer brakes

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I have a 2008 V6Touareg, factory (not dealer) installed towbar and vehicle pre wired for trailer brakes. I wanted to use my Tekonsha Prodigy brake controler from a previous vehicle, VW could not help directly.

After a bit of searching I found...

Info on the web to make the plug to suit the installed wiring under the dash to connect the brake controler to the vehicle wiring, VW part numbers included not very expensive.

http://tm-techmark.com/touareg/PDFfi...%20Cayenne.pdf

Went to an auto elec in Richmond (Melbourne Vic.) and he sorted out the Brake controler and vehicle wiring, the brake controler was being upset by the on board diagnostics. He installed an interface to get the corrrect signal from the brake lights to the brake controler still leaving the onboard diagnostics to do their thing. You could possible find one in SA or give Steve a call for info

http://www.stevevarrasso.com/

A VW LED light interface is needed to fool the on board diagnostics (LED's draw minimal current) on trailers fitted with LED lights it works fine with LED lights on my boat trailer. (mine was part of the purchase deal)

One other thing to look at is if the dealer (not factory) installed the tow bar and wiring, has the trailer light computor been programmed for Australian lighting standards


Graeme

[bobzed57]

Here's a link to my fix http://www.clubtouareg.com/forums/f6...ain-21943.html Not the most elegant solution, but owks for me. I guess it could be installed in a box and used for multiple trailers, but you'd need to be sure you could dissipate the heat.

Works fine lasts 'long time. Ran the system on a 2 and a half week trip to the Flinders earlier this year and not a peep.

Although, will it work on my new D3?

Cheers

[apom]

Hi Guys, i believe this should be a solution, I had was given a solution for my R36 (also on this forum under passat)

The part Number is VGA0055204 LOAD LED LOAD SIMULATOR 5A-300708RA

This is setup for a flat 7 pin design so assume there is a version for round also.

The pack consists of a Male/Female extension with the load simulator in the middle, an instruction leaflet and a set of cable ties. The idea is this thing gets strapped (or permanently mounted) to the trailer, plugs into you towbar lead before connecting to the trailer plug.

I believe these are about $200, however I do not know the exact price as it came with the towbar kit as a peace offering for the stuff ups I had along the way (a long story)

I was told it was a deliberate piece of reverse engineering to fix the problem that is large issue with Touareg owners. I believe Bosch have also come up with a solution that can be a mod to the vehicle wiring but this is an expensive fix.

[boris]

HI Guys,

I believe the indicators illuminating with brake lights is a US thing?

I think this is just a coding change in the trailer module.

The LED light concern can be rectified by the load box because the ecu is looking for a resistance to check if the globes are serviceable. If there is no or very little resistance like an LED the vehicle assumes the globes are blown.

Cheers,
Boris

[bobzed57]

One of the issues most overlooked when you get spurious indications on trailer lights is that of having a good earth. Make sure that where the earth lead joins the trailer chassis it's clean and free from corrosion. If you have a poor earth, it's not uncommon to see park/brake lights dimly flash in time to the indicators and because LEDs have much lower current requirements they're likely to be more susceptible.

Cheers

[Guest]

Coding issue

Hi, think this has been covered before but: Connected my boat trailer to my new V6 TDI Touareg and the lights flickered (lcd's) so I connected to my box trailer and all worked except blinkers come on for Brake lights, (both trailers worked fine on other cars) any suggestions??

Your blinkers come on with the brake becasue the trailer control unit is incorrectly coded it will have the coding on 1 it needs to be set on 3 i hope that helps

[Guest]

LED load box

all the LED load box does is it stops the light bulb symbol coming on the dash when using LED trailer lights

[Transporter]

Another solution this one is from REDARC Adelaide based company, good website with a lots of info on dual battery systems and 12v to 12v battery chargers.

http://www.redarc.com.au/dummy_loads.htm

[phantomcamel]

If your sales person would have been profesional, he would have asked you if your trailer has LED lights & advised you that you need a seperate adapter. I think they are about $240.00 - covered by warranty & no tinkering needed.

[CamB]

Hi, think this has been covered before but: Connected my boat trailer to my new V6 TDI Touareg and the lights flickered (lcd's) so I connected to my box trailer and all worked except blinkers come on for Brake lights, (both trailers worked fine on other cars) any suggestions??

I have just picked up a new V6 tdi with the factory tow package, it came with a "load box" which plugs in between the trailer and car. This enables trailers with LED lights to be used. As previously posted it will be available as a spare part.

Regards,
CamB

[sjhuybens]

Had similar issues (left hand indicator not working, then working, tail lights will flash with indicator, hazards would work, no break lights, warning in dash to tell me that one of the trailer globes was blown when it wasnt), but when testing found that the trailer lights worked fine when you manually switch on the head lights (dont use Auto). Had an auto electrican use a mulit meter on the plug and he identified that two wires were in the wrong spots for Australian use. The trailer I was using works on all other cars, as was the 6 wiring harness we tested. VW said that it is standard factory wiring, so you may find you have what ever the international standard is.

Hope this helps