Q: What are the different aspects of brake pedal adjustment and measurement?
A: Brake pedal height, adjusted by manipulating the adjusting bolt, affects the Brake Light Switch adjustment. This can be altered by turning the switch counterclockwise. Brake pedal freeplay, the distance the pedal moves before engaging the master cylinder piston, is adjusted by turning the brake pushrod. Brake pedal reserve height and stroke, not always applicable, measure pedal distance when fully depressed and pedal travel respectively. Excessive stroke or low reserve height may indicate system issues. Troubleshoot before re-measuring.