Club Touareg Forum banner
1 - 17 of 17 Posts

·
Registered
Joined
·
55 Posts
Discussion Starter · #1 ·
I bought a Touareg used last year and it did not have a hitch installed. I am in the process of installing one. Planning on going OEM. I saw on another thread someone using VW 7P0803881 hitch and VW 7P1055203 tow wiring. Looking online, this is what I see for the wiring from the part number above:
https://www.ecstuning.com/Search/7p1055203/ES2205380/

I understand that there is a module as shown in the link. However, when I look at the passengers side trunk panel I see this module which I think it would mean that a module is already installed in my Touareg (Image shown below) If that is the case, what do I need to install from the module to the hitch (part#) and do I need to do anything else vagcom/computer related???
Dealer said that I need to take it in to get it programmed if installing a towing wiring harness kit. Now, if mine has the module already installed it seems, do I still need to take it in??

"Can't get link to show for image" here is the link:
https://1drv.ms/i/s!AkTEplHYH0eK1g1agsPhq5IJsD1Z
 

·
Registered
Joined
·
82 Posts
Installed hitch and electronics in my 2012 V6. I suspect your 2013 TDI is similar.

My Treg did not have the electronics installed. I installed the module in the aft starboard quarter panel, right where you found yours. On connecting my trailer, I found that turn signals worked, brake actuation worked, but brake lights did not even though 4-way flashers did. The Treg would indicate that a trailer light bulb was out, which is pretty cool. Yours appears to be missing the connection to the 7-way near the receiver; the EOM harness is awesome in that it includes a bulkhead gromet where the wires dive through from inside to outside, and it includes retention parts all the way to the 7-way.

My dealer offered to "code for towing" for 1.5 hours of labor, or $150; he did not exude confidence. My independent garage hooked up VAGCOM and did two things: 1) they told the gateway that the car was set up for towing, and b) they changed a "1" in block 69 (towing) to a "2". Cost $0.

After coding the "1" to a "2" all lights and functions work, including brake lights, and I'm happy. If the vehicle is factory configured for towing, the lift gate won't actuate when a trailer is connected. On my configuration the lift gate works when connected, and that's OK 'cause it doesn't collide with anything on my trailer.

I recommend that you buy a $13 tester to plug in to the 7-way. This will allow verification without needing the trailer. Do this first and find out if you have brake lights, turn lights, brake actuation, charge (12.9V) and running lights. If all that works, you're done. The common thing I've read here is that brake lights don't work 'cause the car thinks it has a European trailer, so you have to inform the car that it has a North American trailer. That's the key coding change that needs to be made.

BTW - My 2012 is a "7P" chassis, and that's what's at the start of the P/N's implying the hitch and wiring harness is for the 7P chassis.
 

·
Registered
Joined
·
55 Posts
Discussion Starter · #3 ·
Cool. Thanks for the tips with the VAGCOM setup. That will be helpful. Now if I coul donly figure out what is the part number for the wiring that runs from the module to the hitch. Everywhere I look they only sell the wiring as a kit with the module. I have to module so I don't want to pay for it. I even called the dealer and they can't figure it out. I might have to end up buying the kite with the module and just selling the extra module later IF i CAN'T FIND THAT. If any one knows that PLEASE LET ME KNOW!
 

·
Registered
Joined
·
55 Posts
Discussion Starter · #4 ·
Curt,

So I did the install last Sunday. I need some hep though. The instructions for installing the OEM wiring are not clear. I found the green plug in vehicle for attaching the other green connector I also understand the other connector of the wiring goes to the module. All that is straight forward. However, the kit includes a small wire with two female connectors at one end a a male at the other and I have looked everywhere and can't seem to find where this would go. Check out the onedrive links fo the pictures of the kit. The second link is for the wiring I am talking about. If you know where this goes I would appreciate some insight!!


https://1drv.ms/i/s!AkTEplHYH0eK6XEXlxNzjJuhkSFF


https://1drv.ms/i/s!AkTEplHYH0eK6XDcWRDjuHQFYJic
 

·
Registered
Joined
·
82 Posts
Javijavit,

The little one is a bit tricky. I reached very far forward in the aft panel, almost to the door and somewhat high. I have no idea what it does, but there was only one way to hook it up with the supplied harness, so I must have gotten it right.

I found the wires about 16" forward of the control box; I didn't fully remove the interior trim piece, but I reached far forward and found it. I think it comes from up high, so search nearly at the door, in front of the wheel well, and near the window. You should find a small bundle of wires with a bridge. Disconnect what's there and install the harness.

Good luck!
 

·
Registered
Joined
·
55 Posts
Discussion Starter · #6 ·
Curt,

So I have looked to the point that I removed all the panels and I just cannot find anything that would hook up to that wire. I am starting to wonder if this would be something that is not needed for all models. My model Touareg LUX does not have sensors in the bumper. Heck here is a picture of the panel removed and I see nothing.

If anyone know what this wire is for and if it is needed Please!!!! Let me know!! Car is all in pieces right now

Auto part Vehicle Engine Car Automotive engine part


.
 

·
Registered
Joined
·
242 Posts
Other thing I noticed in searching google is that ecstuning used to offer an older kit without the small wiring with the male and 2 female connectors. I wonder if that part is for newer T3 models?
 

·
Registered
Joined
·
82 Posts
Javijavit -

You certainly disassembled the interior more thoroughly than did I! My 2012 is also a Lux trim level car. What I found on mine was a very small loom of perhaps 4 wires ending in 2 black connectors. VW likes to tuck unused connectors into odd places to prevent rattles, so they might have buried it.

In your picture I can see what looks like a small wire bundle forward of the "X" structure. That could be what you're seeking.

I wish I could be more help.
 

·
Registered
Joined
·
55 Posts
Discussion Starter · #10 ·
Looked at the threads and nothing is clear. Will try contacting the place mentioned above. Dealer isn't very helpful unless they do it themselves.

As far as the small wiring in front of the "x" that actually goes to the x-structure which is the seat belt winding assembly. MY plan was not to have to disassemble all the panels but as you can imagine, frustration got me and I went crazy just pulling stuff apart. At least I learned how to do it and its pretty easy to pull the interior apart. I just left it like this for a couple of days while I configure the module through vcds and check if it all works fine or if it needs that small wire. Will let you know...
 

·
Registered
Joined
·
55 Posts
Discussion Starter · #11 ·
These are the latest updates on my hitch install. Much harder than I expected due to unforseen circumstances.

I have had no luck finding the small two wire section with black connectors. According to the dealer, my vehicle was manufactured with the hitch included based on the VIN # and it seems that the previous owner removed it. Maybe that is why the small wire connectors are not visible and might not be needed. But other than that theory, nothing else is known.

I installed everything else but the small wire piece and decided to test to see if it worked fine. Using Ross-tech VCDS checked and gateway 69 is showing up so I simply went in and coded the gateway 69 from 01 to 02 for USA and tried testing current on the 7pin with a simple wire tester and got nothing. Not sure if I need a real 7pin tester but I figured a regular wire tester with a bulb that lights up should work the same. I will plan to get a 7pin tester and see if anything happens. Otherwise, I think I might have a greater problem that I have no idea what it is. The VCDS says it sees the module so the module I think is fine. Any idea why I might not be geting the bulb tester to light up? Tomorrow I will be getting a 7-pin tester at teh hardware store nearby and will update on what results I get.
 

·
Registered
Joined
·
45 Posts
accessing the towing control module

Great info.

I have a 2004 Touareg and I am finding it hard to access the location where you install the tow module.

The panel that accesses the CD changer reveals the green plug for the harness, easy enough.

However to get access to the tow module location it looks like I have to take a lot trim of panels off, is this correct, or am I doing something wrong?
 

·
Registered
Joined
·
20 Posts
Did you ever figure this out? I seem to have the opposite problem.

I'm pulling the tow package off a 2012 tdi sport onto a 2011 executive. The 2012 doesn't have this small wire but on the 2011 I found the connecting wires right next to the red wire for the control module.
 

·
Registered
Joined
·
20 Posts
Did you ever figure this out? I seem to have the opposite problem.

I'm pulling the tow package off a 2012 tdi sport onto a 2011 executive. The 2012 doesn't have this small wire but on the 2011 I found the connecting wires right next to the red wire for the control module.
I think I may have figured this out. That Y connector wire just bridges existing wires together. On cars with the factory hitch installed, that wire is probably bridged together somewhere upstream. That's why your car and my 2012 that had the hitch factory installed don't have that wire. My 2011 that I'm swapping the hitch into has this wire.

Right now my vcds can't connect to the trailer module. I think that is because I don't have this Y connector.

If you still have it, I'd love to buy it off you!

Sent from my SM-G935V using Tapatalk
 

·
Registered
Joined
·
21 Posts
I know I'm coming in way after the fact, but I hope you all might be able to help me out. I just installed an OEM module on my 2011 TDi and got it all hooked up. The lights work fine, but I'm concerned the module is not doing what it is supposed to do. When the coding was changed in VCDS, what exactly was changed? The trailer (69) is showing, so the module is recognized, but I can still open the liftgate when the trailer is hooked up and that tells me that it is not communicating with the rest of the system properly. I can't make sense of the Coding found on the Ross-Tech page ( http://wiki.ross-tech.com/wiki/index.php/VW_Touareg_(7L)_Trailer#Coding ).
 
1 - 17 of 17 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Top