Tiguan Trailer Hitch Wiring - Help Needed

[BladeSlapper]

Hi All,

I'm installing the Genuine Westfalia Trailer hitch wiring loom into my MY13.5 5N Tiguan.
Im a bit stuck on the fuse box wiring, and exactly what the pictorial instructions are telling me..Some words would have been awesome here!

Ref Step 44
In My fuse box, location 2 is empty and 14 is occupied.
Is it telling me to remove the wire from whatever location is occupied and insert it into the black connector (11) on the westfalia harness. Then insert the blue/black wire from that connector into the position the previous wire was removed from?

Next is Fuse locations 39-41 or 40-42, I have the 40-42 configuration, however these locations are occupied..
does this location matter? Or can I select any 3 vacant locations in the same row?

Lastly what does the reference to WA 921 557321 002 mean?

Any Help would be appreciated!

Cheers

[Umai Naa!!]

These should be pre-wired from the factory for the genuine VW kit.

When pre-wired, you'd just buy the VW wiring kit, and just use the control module and short rear section of wiring. Then it's a matter of joining two CAN bus wires under the dash, and coding the CANbas gateway to accept the trailer module.

[BladeSlapper]

Ahhh, Yep, It is pre-wired...
The connector was stowed in the body work behind the vehicle jack storage compartment....

That explains why the fuse positions are occupied...

So, given that its pre-wired, it appears that the CANbus wires are also already installed in the brown connector in pin positions 15, 16 & 17..??

[BladeSlapper]

Guys, How do I know which CAN-bus wires need to be joined together under the dash?

[ian]

Under the Dash R/H side near the kick panel look up and you will see a plug that is wrapped in Foam rubber
see the y harness in this

09-17 VW Volkswagen Tiguan Trailer Hitch Electrical Installation Kit 5N0055204N | eBay

[pistoncranky]

Ahhh, Yep, It is pre-wired...
The connector was stowed in the body work behind the vehicle jack storage compartment....

That explains why the fuse positions are occupied...

So, given that its pre-wired, it appears that the CANbus wires are also already installed in the brown connector in pin positions 15, 16 & 17..??

Hi,
I want to do the same to my 11/2012 132kw TSi Tig and have a couple of questions:


1. About the term "pre-wired", does that mean you didn't have to fiddle around with routing a new (power) wire from the rear to the fuse box area to get power for the trailer light as is required by the ECU provided in Hayman Reese install?

2. Was the Genuine VW harness / kit supplied with a round or flat rectangular trailer connector socket?

I'm wanting to get the H/R towbar and hitch mount without the electrics and do the connecting of the VW wiring kit so I get the VW "smarts" (I know that it will also need to be coded) but I don't want to be arsing-about running cables through the cabin and under trims and carpet. (I have found that foam shrouded connector behind the fuse-box).
Chris

[Umai Naa!!]

No additional wiring required, besides joining the CANbus wires under the dash. The trailer module plugs into the vehicle's existing wiring in the rear of the car. Then you just run the shorter supplied wiring harness from the module, out to the towbar.

You hard-mount the supplied 13-pin round connector to the towbar, but a 13-pin round/7-pin flat adaptor is supplied in the kit.

Also worth noting that the genuine trailer module is not LED-comaptible on these, so if you've converted your trailer to LEDs for some reason, they won't work correctly, or at all.

[pistoncranky]

No additional wiring required, besides joining the CANbus wires under the dash. The trailer module plugs into the vehicle's existing wiring in the rear of the car. Then you just run the shorter supplied wiring harness from the module, out to the towbar.

You hard-mount the supplied 13-pin round connector to the towbar, but a 13-pin round/7-pin flat adaptor is supplied in the kit.

Also worth noting that the genuine trailer module is not LED-comaptible on these, so if you've converted your trailer to LEDs for some reason, they won't work correctly, or at all.

TOP! Thanks. Great to know! I saw pictures of the VW electrics kit and there looked to be a longish loom of wire which made me wonder about the need to thread wires through the cabin (like H/R).
I'm planning to get a Hayman Reese bar installed without wiring (with a $200 discount because there's no electrics) and then buy the VW electrics kit for ~$400 and fit it up so I should end up with solid towing hardware and the benefits of the VW electrics features. There will be a $200ish premium for the VW wiring kit and I will have to do it myself but I don't have a problem with that.. well, that's the plan!..

[Umai Naa!!]

There's two harnesses in the VW kit. The longer one gets fed through the interior on cars that aren't pre-wired. The shorter harness you need either way.

[pistoncranky]

There's two harnesses in the VW kit. The longer one gets fed through the interior on cars that aren't pre-wired. The shorter harness you need either way.

Good info - thanks.
I'm pretty sure my 11/2012 is already pre-wired to the rear. Will have a snoop around in the left side cavity to find that connector.

[ian]

You can find the Trailer plug tapped up next to the left hand tail light its only a matter of pluging it in and wire up under the dash .

[pistoncranky]

Hope someone can clue me up on this a bit more.


I have a kit 5N2055204 which is supplied as a control module and two looms of wiring. (plus hardware bits, external round socket, screws, fuses etc.)
One loom has a 13 pin plug from the trailer connector plug at the towbar end and it connects into one socket of the controle module box. The other loom has a connector which looks significantly like the prewired connector up inside the body behind the jack and tools of my Tig. This is also connecting into the module (box). I'm assuming that because I have a November 2012 built Tig that this loom is redundant and I don't have to chase wires throught the cabin.
Can anyone confirm that I have the right module to connect into the pre-wired connectors and just use the trailer end loom?
The concern I have is that I dont have the Y-connector (one end - two tails) described in above posts to fit into the foam covered plug up beside the fuse box.


There seems to be variations of the part number 5N2055204 with another showing 5N2055204N and 5N2055204NA (it seems NA supersedes the N).


Any knowledge on this?

[Umai Naa!!]

As far as I know, the module works in pre-wired and non pre-wired cars. At least it has whenever I've fitted them.

That Y piece seems to be an add-in for other markets.

Over here, we just splice the wires together with Duraseal connectors.

[pistoncranky]

As far as I know, the module works in pre-wired and non pre-wired cars. At least it has whenever I've fitted them.

That Y piece seems to be an add-in for other markets.

Over here, we just splice the wires together with Duraseal connectors.

Thanks for that - I can see these three pairs of can-bus wires with two of them connected together and another unused pair (with a blue plug) next to them. I guess the Y-cable just joins them all in parallel?

Regarding the trailer control module - I have mounted the control module (VW AG 1K0 907 383 F) in the right spot and plugged in the car's pre-wired red 12 way plug which all went well. Its in the VW 5N2055204 kit


I then routed the tail cable loom with the towbar socket on it to the module and plugged it to the other side of the control module and connected the earth leads on the nearby earthing point. all good.


but there is a white plug with three wires coming out of the trailer tail loom right beside the earth leads with nothing to plug into. see pic.

The wires are described in the instructions socket pin-out table and I don't know why there is no connection for them
Colour. Contact No. Function

Yellow 10 Positive charge for battery in trailer (I don't really need this)
brown/green 11 Earth for contact 10 (as above)
red/blue 12 control line for trailer detection



I'm not concerned that power isn't available for things like a fridge in a caravan but the control line for trailer detection not being connected makes me uncomfortable. Isn't this required so that stuff like reversing sensors and parking assist will turn off and also turn on the ESP smarts that this VW kit is supposed to have.


As noted by Umai Naa I didn't need to use the other long cable loom (that runs to the front fuse box / control unit) because this is only used on non-wired cars.. but it doesn't have a connector for these wires either.


Maybe the can-bus sorts out trailer detection through the control box so the red/blue wire and pin 12 is redundant.


Umai, does this unit detect the trailer and deactivate / activate the trailer related stuff?

Cheers,
Chris

[Umai Naa!!]

Once you've sorted out the CAN wires under the dash, and had the trailer module coded to the CAN gateway, everything should work correctly. There's a microswitch in the 13-pin round connector that's bolted to the towbar, that detirmines if a trailer is hooked up (electrically), and will disable the reak parking sensors, and display a trailer on the radio unit, if it's an RCD or RNS 510.

As for ESP function, I don't believe the ABS module is setup for trailer stablisation in this market.

That white plug, as you've figured out, is for auxilliary power to caravan or trailer accessories.