Ignition switches do fail commonly they are cheap and easy to fit but you have to take the steering wheel off and its possible somebody just had the switches and was being tight or lazy
anotger possability is ignition wires got shorted and fried so were bypasses, unbelieveably vw didnt fit a fuse at all to the ignitiin circuit and the wires run over a hot moving engine, how more havent fried wiring i dont know ( i have fitted fuses to black box)
so yes you need to get pics up of the ignition switch loom and how its been modified and black box with connectors pulled out so we can see and coil area, this will tell if rear has been modded. A pic of fusebox wiring would also help to check if ignition wiring has been modified there too.
proper ignition sw wiring
