Hello, welcome, happy Easter, and congrats on the new purchase!!

What you see on tregcentral is exactly what you need. However, you can get it from Waytek much cheaper. Here is the link: Waytek 7-pin socket.

The Trailer Control Module is in the upper left of the cubby, just forward of the CD Changer. There is a red connector on it. I'm really not sure what the other controller is in the bottom of the compartment.

Also, one thing to remember: The module is not a brake controller. If you intend on towing a heavy trailer with brakes that need controlled, you'll still need to add a brake controller like a Tekonsha Envoy or Prodigy.

Hope this helps,
Matt

 

That controller is for the air suspension and has nothing to do with the trailer wiring harness.

 

Ah, thanks aircooled. Wasn't sure on that other module.

Matt

 

Thank you both for the info!

So if I look in front of the changer and see a module with a red connector on it, then I have the module, correct? Or can I safely assume that if I have the factory hitch and wiring to that cover then they installed the module?

Thanks again for the info and quick replies!

 

Yes, I'd assume it's there. Its a PITA to get to and install, but if you look carefully and pull back the edge of the trim, you can probably see the controller. I believe it sits in a vertical position forward of the CD changer and is all black.

 

Took a quick look and it looks like it's there. Perfect.

Thanks!

 

Verifying what is needed

On my 04 Touareg I pulled the side panel out far enough to see the red connector and it looks like there may be a black module there as well. If I have the red connector, does that mean I have the control module? Would I then only need the wiring kit (7L0055204U)?

From the research I have done here it seems that besides the hitch itself I need the module, the wiring kit, and an adapter by the tow head. It would be great if I already have the module as I can squeeze my hand in to connect the wiring harness without removing the panel. Plus it would save me some $$$.

Thanks for the help.

 

My 04 V8 came with the factory tow package which included the 7 pin receptacle, my 06 TDI didn't. It looks like your picture. I took the receptacle out of the 04 and plugged it into the 06 and it worked fine. You can get this at the dealer or most Camping Worlds. I did need to get a jumper cable from the dealer to use my airstream, with LED lights, to the Touareg. I hope this helps

 

I bought the Waytek 7 pin trailer connect. part # 37683 for around $8.00 plus shipping and it fit great. I have yet to test it. Now lets talk about brake controllers. Is there a plug and play controller for my 09 TDI on the market? Is there a plug under the dash like every other vehicle I've owned that I can just plug into and be done? According to etrailer.com the Tekonsha P3 Proportional Controller will work with the factory 7 pin plug $139.95 product code #90195.

 

I bought the Waytek 7 pin trailer connect. part # 37683 for around $8.00 plus shipping and it fit great. I have yet to test it. Now lets talk about brake controllers. Is there a plug and play controller for my 09 TDI on the market? Is there a plug under the dash like every other vehicle I've owned that I can just plug into and be done? According to etrailer.com the Tekonsha P3 Proportional Controller will work with the factory 7 pin plug $139.95 product code #90195.

You can find other threads that discuss which Touareg's have the factory wiring leading to a 4 pin connector up under the dash to connect the Trailer Brake Controller to.

When I recently added a Trailer Brake Controller to my 2006 Touareg V8 I bought a Valley Odyssey Proportional Brake Controller. The VW OEM 4 pin female connector way up under the dash does not match the Valley Odyssey wiring harness' 4 pin male connector, so I had to improvise making the connection. So stay away from that particular TBC unless you are handy with electrical work in tight places up under the dash. It was not fun hooking it up. :evil:

 

First Post of probably many...!

Greetings All,

I joined the Forum on May 09 to bone up on the DoRag. I'm overly pleased to say that once in a hundred years, on 09.09.09, I found what I was looking for, flew to it and bought my new to me 06 V10 Wheat Beige/Pure Beige with 29,700 miles. Truley awesome! And a Thank You to all the member posts whose guidance and assistance helped make my acquisition possible.

Now I'm dealing with the trailer brake control issue. Reviewed the threads and got the info. The VW module plug housing, wires and a Tekonsha Primus IQ are all ordered. The car came with the hitch and wiring to a 7 blade Pollak recepticle. I'm pulling a vintage 64 Airstream Tradewind and connected it. With LED brake/stop/turn lights and incandesent running lights, it all worked but the LED's are pulsing and not all of them illuminate. Not new news.

But I can't seem to find the Brake Control Plug as is supposed to be under the dash! What I did find is a pigtail wire set, maybe a bundle of 2 or 3 wires about 4" long wrapped in black fabric tape coming off the right rear (on the driver's side) under the dashboard. I slit the tape (slightly) and have some bare copper wire ends. Didn't see any foam wrapped anything! How far up and hidden can this plug be? Is it possible that this harness plug wasn't installed?

Any thoughts will be appreciated.
Ed

 

Trailer Brake Control Harness et al

Third times the charm, I found it,just where it is supposed to be, with a little foam sleeve, way up there. It also helps to use the right size flashlight! Now I just get to hurry up and wait for the parts to show up.

The LED issue is still pending. Reference to TB for trailer connector adapters, Forum members have stated that these adapters fixed their LED problems, has anyone used Adapter 2# ZVW 808 004?

If I'm reading this right it (the picture of adapter 2) looks like the trailer side connector features a voltage amplifier that the trailer wires splice into first, then runs to the 7 blade male connector.

Thanks again,
Ed

 

Third times the charm, I found it,just where it is supposed to be, with a little foam sleeve, way up there. It also helps to use the right size flashlight! Now I just get to hurry up and wait for the parts to show up.

The LED issue is still pending. Reference to TB for trailer connector adapters, Forum members have stated that these adapters fixed their LED problems, has anyone used Adapter 2# ZVW 808 004?

If I'm reading this right it (the picture of adapter 2) looks like the trailer side connector features a voltage amplifier that the trailer wires splice into first, then runs to the 7 blade male connector.

Thanks again,
Ed

The trailer side goes not to a "voltage amplifer" but to a Trailer Light Controller Module (TLCM), this protects your Touareg from shorts and crosses. It also senses circuit current flow and the MFD will alert you if trailer bulb burns out. It also converts from separate park / brake / turn circuits to the combined ones that trailers use.

It also senses a Trailer plugged into the connector and sends notification over the vehicle data bus to the Engine Control Module and Transmission Control Module changing engine maps and transmisson maps to accomodate more weight and vehicle inertia. It also ties the Trailer plug into the vehicle alarm system, the alarm system can be configured to go off if the trailer is unplugged with the Touareg key out.

The trailer brake pin on the 9 pin connector does not go to the TLCM but directly to one pin on the 4 pin plug way up under the dash (unless you have a new 2007 or later Touareg 2 after they stopped including the wire that goes up to the dash from the back).

If the TLCM does not see enough current flowing if a particular bulb circuit only has LED bulbs, and does the flash thing. Those wacky VW engineers again causing trouble for all of us

You have to buy or make an adapter that causes the circuit to draw enough current to make the VW module happy, if you have a trailer with LED lights. See other threads for more info on this, many others have had and solved that problem on the Touareg.

Finally there is a configurable code option in the TLCM for "US mode" and "Rest of World Mode" some of the '04 and '05 owners have had to deal with their US Touaregs having that code set wrong but you should be fine on your 06 vintage Touareg.

 

Here is the link for the trailer LED light issue and how to resolve it. No need to rewire, add resistors, bulbs, etc. There is a VW adaptor and a Uhaul adaptor out there that will make your LED trailer lights stop blinking and work fine.


http://www.clubtouareg.com/forums/f66/trailer-light-hook-up-23687.html

 

Thanks 1040, I've got the VW#2 adapter on order and looking forward to the fix.

 

more LED Drama


People are funny. My experience is such that if you ask 3 people the same question, you can usually get about 5 answers.
I participate in the Touareg and Airstream Forums. This LED lighting trailer/tow issue has been brought to light, pun intended, by numerous folks all experiencing the same or similar problems. Here are some of the answers I’ve found;

LED Voltage Stabilizer (solid state), add this to LED device and wire to ground, supply and output to device.

.5 MFD (Microfared) Capacitors, add to wiring harness.

Powered Isolating Tail Light Converter, attach to the tail lights of the tow vehicle.

Load Resistors, install from tow vehicle to travel trailer. (Or vice versa I think)

I performed a search for each of the above, and the winning answer or product solution, says this about Load Resistors:

Automotive LED Light Bulb Load Resistor Kit - Solve the Signaling Problem with LED Bulbs​

​

Special Note:
One Load Resistor is required for EACH Turn Signal Bulb or Brake Light Bulb​

LED bulbs may cause some newer vehicles to indicate a bulb is burnt out (because of their low power consumption). Some cars indicate this by increasing the flash rate of the turn signals, some turn on a bad bulb indicator. This can be remedied with our Load Resistors wired across the turn signal bulbs to simulate a filament bulb load.
This 6 Ohm, 50 Watt resistors can be connected across the turn signal bulbs to simulate the load of a regular filament bulb (2 Amp load). This will solve LED related turn signal problems such as hyper flashing or burnt out bulb indications. This LED Load Resistor can be use with most signal or brake light which uses SINGLE or DUAL FILAMENT LED light bulbs, like the 7443, 1157, 3157, 4157, 1156, 7440, 3156 etc. Resistor measures 1.96L x .64W x .60H inches, leads are 12 inches long. Kit Includes gel filled moisture resistant splice taps.
CONNECTION INSTRUCTIONS:
Using included splice taps, connect one wire to ground and the other wire to the turn/brake hot wire. Splice taps allow for installation without cutting your turn signal wires.
Automotive LED Light Bulb Load Resistor Features:
-- Solve LED related turn signal problems such as hyper flashing or burnt out bulb indications.
-- Compact design for easy installation.
-- 6 Ohm 50 Watt resistors can be use will most import and domestic vehicles.


Here’s the link for this product: http://www.eautoworks.com/product-Led-33226.htm If you think this product is going to provide a solution for your specific LED issue, take a moment to shop this item as I have found pricing to vary as much as 35%.

So while I’m waiting for delivery of the VW adapter for my trailer and hoping that the adapter will just fix my fix, I have this other solution above to go to in the event it don’t! Boy, are we all having fun yet?

 

Seriously...do not waste your time with any rewiring, resistors, capacitors, etc. No need to reinvent the wheel. I went through the same thing you are going through. All kinds of people were telling me to do all kinds of crazy wiring, soldering, etc.
This adaptor is the fix.
Here is the official VW TSB on the issue along with the fix:http://www.billswebspace.com/vw.tb.....com/vw.tb.94-06-15_trailer_lights_inoperative_operate_intermittentally_869.pdf

 

axg1040, thanks, I'm with you on that. That TSB is what lead me to get vw adapter#2.

 

Just bought my Curt Class III Trailer Hitch Receiver from etrailer.com I have an 04' V8 without factory installed hitch. Does anyone have a link to a comprehensive list of part numbers for all of the wiring that I need. I read this whole post start to finish and it appears that you all have/ had some sort of factory hitch to start with.

Thx!

 

Did etrailer supply you with the correct bolts?? if not you might be in for a surprise. I have one and the holes did not match up exactly so bolts with the car would not fit. the bolts supplied were too thin
Got it solved with adaptor sleeves for these bolts from VW and had etrailer pay for them.
My advise return the shipment and buy the whole OEM set and install yourself

 

Brake Wiring From Hell?

Here’s the summary follow-up to getting my trailer working with my 06V10 with what appears to be a factory/dealer installed trailer hitch. The builder code designation is not shown on my Vehicle Data Sticker. :?:

The VW adapter #2 was installed and had zero impact to the pulsing at the LED turn/stop/tail lights on the trailer. Also adapter #2 appears only to consist of a 7 blade male connector wired to a female 7 blade connector creating a 2 foot pigtail. Unless there is a computer chip imbedded in this thing somewhere, (because it just looks like 2 standard connectors wired together) there is no Trailer Control Module evident. The solution I implemented was to re-install the incandescent turn/stop/tail lights. All lighting functions are working properly without any trace of pulsing with the original trailer connector.

The remaining issue is the brake controller to operate the trailer’s single axle electric brakes. I installed a Tekonsha Primus IQ brake control per instructions. Traveling forward with trailer attached, the manual brake slide on the controller has no impact, nor is there any braking of the trailer with the Touareg brake pedal. When the transmission is placed into reverse, the trailer brakes lock up. Disconnecting the brake controller under the dash from its’ harness, the trailer brakes lock-up when the transmission is in reverse. S_it howdy!!!

After several hours of diagnostic review checking for voltage and continuity in both trailer and Touareg (1) there appears to be a short between the back-up lights and the brake wire (2)and no power is evident at the brake wire center blades of the Touareg connector.
Connecting the trailer to my Tahoe tow vehicle, everything works correctly.

I’m hoping (hope implies doubt) that this brake thing is a VAG-COM fix. Perhaps my setting is not on North American. I had the dealer run an error code check during the purchase routine. Here’s what it reads for these 2 items:

Vehicle Electrical System Control Module
7L6937049N
Coding 111839
Dealer number 31414
-------------
-----
3002
0 Fault(s) detected

Trailer Function
7L0907383G
ANHAENGERELEKTRONIK
Coding 2
Dealer number 31414
7L0907383G
---
8854
0 Fault(s) detected


Before I run off some 75 miles to a VW Dealer that I have no prior relationship with, I’d sure appreciate if any Forum members can point me in the proper direction.

In the meantime I’m going to wire the brake controller red wire directly into the VW provided harness under the dash rather than the brake light switch and see what happens.
Looking forward to hearing from you,
Thanks,
Ed

 

COWABUNGA !!!


All is well and life is goooood.
Seems there was a combination of not only operator error but internal conflict as well. It turns out, after getting a good look at the OEM Pollak vehicle plug on the Touareg, that the back-up lights are wired to the center connector whereas the plug on the trailer has the electric brake line wired to the center connector. I installed a new Pollak male plug on the trailer and matched the wiring sequence to that of the Touareg. Problem solved.:clap:

Of note regarding the direct wiring of the brake controller under the dash to the VW harness, the manual slide on the controller worked the brakes just fine, but the foot pedal did not. Hooking the brake controller red wire to the cold side of the brake switch, as per the instructions, put that issue to rest.

Glad I finally figured this all out. Trust that this DIY rant, rave, whining and cheers will assist others on their first pass at installing this stuff.

Ed

 

Great waytek part. Thanks!

"What you see on tregcentral is exactly what you need. However, you can get it from Waytek much cheaper. Here is the link: Waytek 7-pin socket."

That is a good find and killer price. Did the holes match up? I needed a 4 pin flat in addition to the round (Did not want to get more adapters to lose or get stolen or fail) I found this part that fit at walmart. A little more, 25 bucks or so. I drilled out the bracket a little so the screws would line up. two screws are holding it nice and tight. Pleased that it worked with no issues. http://tinyurl.com/44lqzqz

 

hey guys, i apologize for asking what has been asked a billion times here but I just want to make sure I buy the correct items the first time around.
I'll be towing a small trailer with 4 pin light wiring. I think I have what I need in my amazon cart but I want to make sure.
Please let me know if I have everything I need in the attached image.

Thanks everyone.

 

Looks right to me...I didn't get mine from Amazon but the pollak connector and the 7 to 4 pin look similar to the items I bought. You should be set.

 

Thanks!

 

does this plug/socket work on the 2012/2011?

Just got my new Treg and I'm hoping to pop in a connector.

 

All,

Just for the sake of your sanity, i figured out the connector. The pollack part you all listed is compatible throughout the generations. These connectors seem to be a standard type. I picked mine up at Canadian tire. It is a reese towpower. These are OEM connectors on north american vehicules. I hope this saves anyone else the pain of figuring this out. It seems that although the Pollack is a good deal, if shipping is expensive, head down the the parts store and buy whatever one is there as an OEM replacement. Mine was about $20.