How do you troubleshoot brake lights on a 86 Chevrolet Caprice Classic and turn signal?

To troubleshoot the brake lights and turn signals on a 1986 Chevrolet Caprice Classic, first, check the bulbs to ensure they are not burnt out. Next, inspect the fuses related to the brake lights and turn signals, replacing any that are blown. If the bulbs and fuses are functional, examine the wiring and connections for any signs of damage or corrosion, particularly near the tail lights and under the dashboard. Finally, test the brake light switch located at the brake pedal, as a faulty switch can prevent the lights from functioning properly.