Which of the following actions is NOT recommended when checking low pressure warning signals?

When checking low pressure warning signals, continuously stepping on the brake pedal without release is not recommended because it can lead to an inaccurate assessment of the air pressure in the braking system. This action can cause the pressure to drop further, potentially triggering a warning signal that may not accurately represent the system's normal operating condition.

Proper procedures involve ensuring sufficient air pressure by shutting off the engine or turning on electrical power, which allows for a proper system check. Checking for the warning light response is also crucial as it confirms that the warning system is functioning correctly. These actions help ensure that the vehicle's air pressure and braking systems are operating safely, thus preventing risks associated with low pressure warnings.