What is the main indicator that windshield washer fluid needs to be refilled?

The main indicator that windshield washer fluid needs to be refilled is typically a warning light on the dashboard or the visible presence of an empty reservoir. Many modern vehicles are equipped with a dashboard alert system that informs the driver when fluid levels are low, specifically for essential fluids like windshield washer fluid. This proactive notification helps ensure that the driver maintains visibility while driving, as a lack of washer fluid can lead to dangerous driving conditions, especially in adverse weather.

Additionally, an empty reservoir can often be observed during routine inspections. Drivers may notice that when they try to use the washer system, no fluid is dispensed, which is a clear sign that the reservoir needs attention. This reliable method of monitoring fluid levels is designed to prevent issues before they arise, maintaining safety and vehicle functionality.