1998 Volvo S70 - ignition dinger and floor light stays on?

The sensor is integrated with the door latch. Over time, the door has begun to sag on its hinges which affects the alignment of the door when closed. The mis-alignment prevents the completion of the electrical circuit that terminates the dinger upon closing the door.
The latch on the door or on the door post can be loosened and reset to get things back into alignment.

Harry Sanderson
November 2010