Chevrolet Blazer - 1999 Fuse Box Diagram Blazer - 1999 Fuse Box; yellow. blue . 2-15. If the alarm does not sound when it should but the. vehicle’s headlamps flash, check to see if the horn. The instrument panel fuse. block is at the driver’s end. of the instrument panel. Remove the cover by turning the fastener. counterclockwise. Interior Fuse Box Location: 1998-2005 Chevrolet Blazer The video above shows how to replace blown fuses in the interior fuse box of your 1999 Chevrolet Blazer in addition to the fuse panel diagram location. 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.