What are some things to check when a 1988 Volvo 240 dl wagon has no brake light upon depression of the brake?

When a 1988 Volvo 240 DL wagon has no brake lights, first check the brake light bulbs to ensure they are not burnt out. Next, inspect the brake light switch, located near the brake pedal, as it may be faulty or misaligned. Additionally, examine the fuse related to the brake lights for any signs of damage or failure. Finally, check the wiring for any signs of corrosion or disconnection that could impede electrical flow.