I do not believe I have any problem with the steering column lock or the vac switch. It feels more like an electrical contact has just been worn down and if I wiggle it just right it might work one time again. Maybe. For a couple of weeks I would jump it the first time of each day and then it would work fine for the rest of the day; then it just stopped working at all.

Will try to find something on Youtube. So can't I just slide out the ignition switch and slide another in? Not sure as I have no idea what the whole set up looks like - have never been into it.