Wiring Diagrams

I want to fit a new alarm and immobaliser to my Mark 1 Cabrio (1993). Was wondering if this is a difficult job, haven't attempted anything like this before, and where i could get hold of wiring diagrams from. Also need to fit a door lock motor to the passenger door, is this difficult to do? Any help much appreciated.

Thanks
Shyam

Haynes manual mate  :mrgreen: