Not my car, but had a call from a local bloke who has just picked up a '74 Beetle and is working through his list to get it roadworthy. Has a mystery electrical problem and is after some advice.

Engine running, headlights off, turn ignition to off, engine stops.

Engine running, Headlights on, turn ignition to off, engine keeps running.

It would seem to be odds on that there is a short-circuit. Any tips on where to start looking? I'll be starting at the wires to the headlight switch and following them, but happy to take advice.

Check wiring at headlight switch first.

Look for dodgy modifications that some halfwit has done.

late vws have headlamp turn off built into ing swich when you turn off eng it will go back to park lamps only. possable falt in ing wiring