XC90 - Westfalia Detachable towbar fitting guide

[indiebands]

Originally Posted by Coconut

Hi Tom,

The cable harness number you mention is different from the one I bought - Mine was part number 30756530 ( £15.26 + VAT ).

The trailer module ( Control Unit ) number is the same. ( £27.91 + VAT ).

These were the only two electrical parts I needed - the Cable harness has the 7 Pin socket on one end,
and 3 x factory moulded plugs on the other end, plus an Earth eyelet.
( AFAIK The smallest of the 3 plugs is not used on the 7 pin 12N wiring set up ).

The grey and green plug connects into the Trailer Module,
and the black plug connects into the fuse board behind the rear nearside trim panel as described earlier.

The wiring instructions for the 7 - pin set ( 12N ) describe selection of ONE of the following options via Pin 2 of the 12N socket :

Rear Fog Lamps, or
Charging, or
Reversing Lamps

I went for rear Fog Lamps being the one I thought I would need most often,
( and which I probably need legallly in the UK ? ).

Selection is made by inserting ( push to click lock ) one of 3 wires from the harness into the appropriate position on the appropriate plug.

I have no idea what would happen if you just connected up the black socket to the fuse box, with the other plug left free ( no Trailer board ).

I have no information on 13 pin wiring or additional 12S socket wiring.

Hi Coconut,
Thanks for the quick response. I did forget to mention that the Thule G5 909 needs a 13 pin connector, so that would explain the different part number for the cable harness. The trailer module price works out to 68 GBP, so I guess parts are more expensive here. I guess I can check eBay or US suppliers.
Cheers,
Tom