Why is the typical rear load leveling system connected to the ignition circuit?

The typical rear load leveling system is connected to the ignition circuit to ensure that the system operates only when the vehicle is running. This connection prevents the system from draining the battery when the vehicle is off, as the leveling system requires power to adjust the air springs or shocks for optimal ride height. By linking it to the ignition, the system can automatically adjust while the vehicle is in use, enhancing ride quality and handling without compromising battery life.