Q&A

Sounds like your on the right path, the switch will cause both of the problems you're having. The switch is likely part of the door lock assembly, here is a pic of the part: http://bit.ly/bIP9zM
It is #2
I strongly suggest you get a repair manual for this vehicle if your going to be doing your own work. You can get an online subscription to excellent information here:
http://bit.ly/mitchell_repair_manuals_online
http://bit.ly/alldata_repair_manuals