I've pulled a lot of key cylinders. I think 78 or 79 was when
they went from spring retained to screw retained. You need to
pull the steering wheel and about six or seven other parts. It's
a real PIA, even if you've done a bunch of them.
The switch is right behind the cylinder, and is held with a
couple big Torx screws.
Many locksmiths have this skill, cause we need to pull the switch
to recreate a lost key. The problem can be either the cylinder or
the switch. Can't tell, till the column is taken apart.
Christopher A. Young
You can't shout down a troll.
Click to see the full signature.