If you were nearer ...... 
It's not difficult to fit. 2 bolts & long spacers up front near the diff, 2 more towards the back and 3 across the vertical back edge of the boot. If you have the towbar there you can see where they all go. The boot floor is dimpled where the holes need to be drilled, clearance on M10 bolts IIRC. That's it.
Wiring is (mostly) all there in the plug/socket at the back of the boot under the trim that you've already removed while fitting the tow bar.

If it's an OE type with the plate in the boot floor, scrape all the bitumin type insulation off first where it bolts down. 

I have just fitted a brink detachable to my estate,it was quite easy to do

cmeonthemove wrote on 30. Mar 2010 at 12:29:


You don't really need a wiring diagram, you'll find the relevant colours on various posts over the years but here goes  ...... again 

Car ................. lamps ............... 12N socket
black/blue ........rear fogs ............blue
black/white.......left turn ..............yellow
black/green ......right turn ............green
grey/black.........left tail................black
grey/red............right tail..............brown
black/yellow......brake..................red
brown...............earth...................white

be aware though that the brake lights are fed via a 'relay' base for a trailer check control, so your trailer feed need to come from the actual lights or if you use the socket in the back of the boot, you'll need to bridge the base connections to get your trailer lights to work. (above the driver's feet on pre facelift & behind the glove box on facelift cars)

12S socket feeds can easily be found via Google & to a degree depends how old your caravan is as to how it's wired.