The seat belt reminder buzzer and key in ignition buzzer and driver's
door (only) interior light were all routed through the "warning device,"
a relay, in older models; it appears they still are in your '93 model.
Suggest you have the "warning device" checked. It cost about $125 in '83
who knows what it costs now.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.