Welcome.
With the interior lights/dinger, yes check the door jamb switch. Could be as simple as too much corrosion around the grounding screw.
My Cars
1999 Silver Frost SVT - 80,000km #2603/2760 Aug. 10, 1999.
1996 Mercury Mystique LS V6 MTX - retired @ 323,151km.
1995 Ford Contour V6 MTX-sold @ 214,000km
