Electric Cabriolet roof wiring diagram

Soo.. now the weather is getting better I'm spending time working on the golf.

I need a complete wiring diagram for the electric roof as it's quite literally got a mind of it's own at the minute.. the motor is kicking in even when the key isn't in the ignition, which is creepy when it happens in the middle of the night, so I've currently got the roof disconnected but I need to sort it. 

I think I'm right in thinking that there is a switch in the ignition barrel for the roof? I'm thinking this is dodgy. Rather than having to swap ignition barrels and keys etc. I want to rewire to bypass this switch and fit a switch elsewhere in the dash area somewhere.. hence the need for a complete wiring diagram for the electric roof.. I can't find one specifically for the roof which is annoying! 

For reference the car is a 1991 clipper cabriolet..

TIA 

I think you have a wonky ignition switch.