Tow bar wiring - 1D7 Trailer Hitch Preparation

[wfdTamar]

Right I've worked out what the code '1D7 Trailer Hitch Preparation' means (you might have this on the sticker in the boot/service manual with all your vehicle option codes).

It is (as people have guessed previously) all the trailer wiring to a plug in the boot (left hand side behind the panel).

Here's some photo's:

http://www.flickr.com/photos/8753947@N06/with/6971837758/ (top four photo's)

There is a red plug behind the fabric panel in the boot, left side. It's covered in a grey foam 'sock' - that is the T12s plug for trailer wiring. It plugs into the J345 VW Trailer Detector Control Unit, which then has wiring going to the external socket next to the tow bar (neither that wiring, or the J345 are part of 1D7).

So if you have the 1D7 code all you need is the Trailer Detector Control Unit and the wiring to the socket, and the socket near the tow bar. There is no need to do any wiring to the front of the car. Install that then you need to get the car coded at the dealer (or do it with VCDS if you have one).

T12s plug Pinout.

pin 1 brown (earth, luggage compartment, left)

pin 2 Black/purple (from fuse 19, 5A, in the fuse panel right side of dash - which comes from a permanent, positive connection in dash panel wiring harness). I gather this would be used for things that require a permanent 12 volt power source like fridges.

pin 3 Black/red (Stop)

pin 7 Orange/green (CAN H)

pin 8 Orange/brown (CAN L)

pin 9 Red/yellow (from dash fuse 43)

pin 11 Red/blue (from dash fuse 44)

pin 12 Red/green (from dash fuse 45)

(from Elsawin Skoda manual)

You can get compatible wiring kits here (if you don't get one from the dealer). These kits presume you don't have 1D7 though. All you would need is the female version of the T12s plug, or chop it off and do your own type of connection. (not sure how good the prices are):

http://www.pfjones.co.uk/towbar-wiring-kits/skoda-towbar-wiring-kits/skoda-octavia-towbar-wiring-kits.html