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jvicary243

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Discussion starter · #1 ·
First a little disclosure, I've been working on cars as a shade-tree mechanic for years, so I wouldn't say I'm a novice. I also put the time in to reading several posts here and watching Etrailer.com's video on how to install the hitch. All this relates to a brand-new 2010 TDi with about 600 miles on the clock.

So, mechanically speaking, this is a relative breeze. The time to remove the bumper cover, swap the hitch for the bumper support and put it all back together was less than an hour. All was completed by myself. Admittedly, getting the hitch into place was a little tricky for one guy, but not impossible. The surprise was the wiring. I kept reading horror stories about installing the relay box, but I'm a little confused as to why. I don't have the CD changer, which probably makes life easier. So, when I remove the passenger-side panel in the loading area, all the plugs are within easy reach. Consequently, wiring took only a couple minutes. A couple more minutes for the fuses (you see where this is going). Finally, as I finished installing the bumper cover, I installed the OEM accessory mud flaps. So, all told, about 90 minutes.

Now for the disappointment. First of all, why does the hitch come pre-wired, but with an OEM plug instead of the normal 7-pin receptacle? I assume the answer is so that VW can sell you another little accessory for more than it's worth. To add insult to injury, the universal receptacle I wired up to the hitch pre-wire had a slightly different bolt pattern than the hitch. A couple self-tapping machine screws took care of that, but it was a little frustrating none the less.

All in all, it was a good experience and an easier install than I was expecting. I would encourage those of you on the fence about doing the install yourself to take the plunge. My dealer wanted $1500 for the hitch including install. However, since I just bought the car there, they give me 15% off parts and accessories for 30 days. So, I only had to pay about $650 for the OEM hitch plus a little bit of my time. Not a bad deal at all.
 
I agree that the mechanical part of this is a breeze & that's as far as I got in a few minutes.
Since you've just done this I'll start with your experience before I delve into other sources please.
Do you have a part number for the adapter to the 7 pin?
ETKA has nothing.
The written instructions are vague.....the 12 pin from the harness to the control box & the connection to the car's harness are easy ,but the other (green 6 pole plug) is a mystery.
I'm also told by a friend that whatever extra harnesses I need are bulb specific (LED vs non-LED ) or you can fry the car's harness.
Thanks,
Steve Schmidt
 
Discussion starter · #3 ·
Steve-

The 7-pin receptacle I wired in was generic in nature, purchased from my local Kragen auto parts. It was made by Hopkins Manufacturing. I never looked to see what VW offered. Instead, I simply cut all the wires from the plug that was pre-wired to the hitch and wired up my generic receptacle. The generic receptacle has screw-type terminals which makes the wiring easy. The only caveat is that the white wire on the hitch was in fact light brown. It was easy to spot based on it's location amongst the other wires, but it's a pretty thick wire as well making it a little trickier to attach to the terminal than the rest.

As for the factory wiring of the control box, it was simple. I can't say anything about LED vs. incandescent lights, but for the standard bulbs, no problem. There are two harnesses pre-wired with the hitch, one black, one green. Once they are both fed through the hole in the rear quarter panel, you connect the the black one to the control box and the green one to a green receptacle just inside the rear quarter. There's also a red plug pre-wired in the car that also plugs into the control box. Once you track everything down, it's plug and play. It's also worth noting that the hitch prewire makes it hard to screw up. The black plug on the hitch has a much longer lead than the green one. That's your hint that it's the plug that goes into the control box as the red plug is basically right on the top of the wheel well, a couple feet away from the green plug just behind the tail lamp adjacent to the hole in the body the wiring is run through. In my case, I didn't even bother to secure the control box in the body because i have a first aid kit sitting just behind it which keeps it in position.
 
Easy

Sure enough; after some pulling & poking the red connecter emerged from it's hiding place!!

All that's left now is a VW part # (please) to connect the harness to a 4 pin & connect the prodigy p2 (newer than the P3?).
Thanks!!:D
 
Discussion starter · #5 ·
Can't help with the VW part numbers since I didn't buy the VW parts. Hopefully someone else can provide them. I'm going the Prodify RF route to make the wife happy, but that's not all sunshine and roses either as I posted on another thread today. The Prodigy RF doesn't want to pair on a Treg because there's always a little voltage goign through the lighting circuits (for no obvious reason) which confuses the RF. Apparently, once you pair it on virtually any other vehicle, it works just fine. Go figure.

Good luck and happy motoring.
 
Sure enough; after some pulling & poking the red connecter emerged from it's hiding place!!

All that's left now is a VW part # (please) to connect the harness to a 4 pin & connect the prodigy p2 (newer than the P3?).
Thanks!!:D
4 pin? How do you get trailer brakes on a 4-pin?

The 7 pin VW connector is part number ZVW-808-007. List is $32.32 and my dealer charged me $22.76 after tax. Interestingly enough, when they installed the hitch they included this part although others told me I'd have to provide it myself. So I have an extra.

AndrewT
 
4 pin? How do you get trailer brakes on a 4-pin?

The 7 pin VW connector is part number ZVW-808-007. List is $32.32 and my dealer charged me $22.76 after tax. Interestingly enough, when they installed the hitch they included this part although others told me I'd have to provide it myself. So I have an extra.

AndrewT
I'm pretty sure he means the 4 pin connector under the dash that connects to the brake controller.

The parts you need are:
Plug Housing #1J0972782 Quantity Required: (1)
Wires and Connectors # 000979228 Quantity Required: (2)

Here's another thread with details on wiring the relay on the newer T2's http://www.clubtouareg.com/forums/f...rums/f66/touareg-t2-harness-to-prodigy-brake-controller-instructions-35417.html
 

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I bought a used 2006 V8 T'reg online, unknowingly, WITHOUT a trailer hitch, which I thought was impossible these days......I am in the middle of a trailer hitch and wiring install and obviously fell short on this one.
I bought the actual bumper hitch from E-trailer and easy enough install. They sold me the wrong harness, as it was generic, and gladly refunded my purchas.
I bought the OEM harness for a whopping $230...but NO instructions. just "plug and play" they said, "It is obvious".
Well, not in my rig...
When I opened up the back panel there are two "connectors"
The green one is very obvious, but the only other "black"connector has approx. 12 pin slots while there are close to 18 on my harness. I would think this 12-pin is for the CD changer, but don't know. (i obviously don't have the CD changer either)
I can barely see a RED connector in the fender well...
What is this for?
ECS only sold me this one wiring harness and the rep i spoke with does not know what else I need...I obviously don't either...!
So, who does...after reading these threads and some DIY, I went to the dealer and they make it out to be rocket sciense and want another $700 to finish what I have started..you must be joking...
We're talking about a trailer hitch here..that has come on EVERY vehicle I have purchased in the last 20 years...
Who would have guessed a trailer hitch install is $1500....not me, should have kept looking for one already installed...
HELP !
thanks
 
Problem is that I don't what I am looking for....is it the RED connector or another BLACK one ?
Am I missing something altogether that I need to BUY and run from up under the dash to the rear of the vehicle and THIS is what I plug the BLACK end of the harness to?
Some photos or schematics would hopefully solve the issue.
I will also call another dealer to see if they are more customer-friendly than the last one I called.
 
The Treg adapts it's ABS and alarm system when it senses a trailer is connected.

Can't remember if VAGcom is required or not.
 
T'reg Blues

Thanks, Schmidt694. Your photos easily show the control module I am lacking. My foot hurts from kicking myself for NOT noticing this T'reg did not have a basic trailer hitch. Imagine my surprise when I pulled off the plastic cover to hook up my dirtbike trailer and there wasn't anything behind there for my receiver hitch...I am a heartbeat away from scrapping the whole idea and reselling it...The dealer wants $400 for the control module itslef and another 1.5 hours to reset the program once everything is installed...I will be well over $1,100 when I finally get a trailer hitch to use.(And I installed the hitch, the majority of the "work". The rest is Factory-proprietery BS, in my opinion) A ridiculous amount of money after-the-fact for a hitch and wiring....Did I tell you that the driveshaft fell out last month?(luckily under warranty, but just barely)..But, standed nonethe less. I am definitely NOT the best customer relations person for VW right now....
 
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