OK, I've got the notes now
Things you can test -
Clutch switch: light on when pedal is RELEASED.
Neutral switch: Light on when car is in gear, off in neutral.
Automatic tranny inhibitor switch - light on in L, S, D, or R, off in N or P.
Headlight switch - light on when headlights are on.
Blower switch - light on when AC blower is at position 3 or 4.
Rear window defrost switch - light on when defroster is on.
AC switch - light on when AC switch is on.
These are all the inputs for the electrical load system, and if any of them are malfunctioning you'll have idle problems and other woes. Biggie for me is being able to easily test the clutch switch without removing it or trying to get a meter to the connector up under the dash.