The courtesy lamps are the lights under right and left dash.

Find the orange glove box lamp wire, it is probably loose behind your glovebox. When mounted, it is in the upper front left corner of the glove box, attached to the switch. It's an interesting little bugger, and the wire is often yanked or chopped off.

Door jamb switches not grounding will not blow a fuse.

A new headlamp switch does not mean it's a good headlamp switch. It may be best to remove it and check it with an ohmmeter for internal shorts.

Be sure the gray wires in the dash harness are not shorted to ground.