The fuse box in is the driver side by the emergency break pedal on its left its a black box there would be all fuses. Electrical components such as your map light radio heated seats high beams power windows all have fuses and if they suddenly stop working chances are you have a fuse that has blown out. The video above shows how to replace blown fuses in the interior fuse box of your 1998 infiniti q45 in addition to the fuse panel diagram location.