Have a look at vintagebus.com . There are over a hundred wiring diagrams....
Just click on Wiring Diagrams... then scroll down past the BUS diagrams to Beetles.
Most diagrams are in color....
Its very difficult to match a wiring diagram to an Australian year model Beetle as VW in their wisdom, made wiring diagrams for diferent countries... Just look for a diagram that has the same setup that You mentioned. You may be lucky and a 74 diagram might be compatible with Your car.... but USA Beetles have always had a different wiring setup to beetles elsewhere in the world...
Good Luck... Lee Noonan 68AutoBug
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---
