Final answer:
The ignition key should be in the "on" position during a pre-trip inspection to check the electrical systems and ensure all dashboard indicators function properly. It must turn smoothly and the vehicle should be parked securely.
Step-by-step explanation:
During a pre-trip inspection, the ignition key should be in the "on" position without starting the engine. This allows you to check the electrical systems including the dashboard indicators and to ensure that all warning lights and gauges are working properly.
If the vehicle is equipped with a push-button start system, the equivalent procedure would be to have the vehicle in accessory mode. It is crucial also to verify that nothing is impeding the use of the key in the ignition and that it turns smoothly without any issues. Safety being paramount, during a pre-trip inspection, one should always ensure the vehicle is parked securely and that it is safe to perform the inspection.