What is the first step when performing the skill of starting, idling, and shutting down a fire apparatus?

When starting, idling, and shutting down a fire apparatus, the first step is to ensure all external electrical cords are disconnected. This precaution is vital to prevent any accidents or hazards that might arise if the apparatus is started while connected to external power sources. It also ensures that the equipment and any devices powered by those cords are not inadvertently damaged when the vehicle is powered on.

While checking the fuel level, making sure all doors are closed, and inspecting the tires for proper pressure are all important safety checks, they come after ensuring that external connections are safely disconnected. Disconnecting external power sources first helps mitigate risks associated with operating the vehicle, such as electrical shorts, potential fires, or damage to both the apparatus and the external equipment.