The bulb symbol on the car dashboard is the bulb failure indicator light. It illuminates when license plate lights, width indicator lights, reverse lights, etc. are damaged. Below is relevant information about the car dashboard: 1. Introduction: The car dashboard is a device that reflects the working status of various vehicle systems. Different cars have different instrument panels. However, conventional car dashboards generally include a speedometer, tachometer, oil pressure gauge, water temperature gauge, fuel gauge, charging gauge, etc. Beneath the surface of modern car dashboards, various indicator or warning lights are installed, such as coolant level warning lights, fuel level indicators, washer fluid level indicators, charging indicators, high/low beam indicators, transmission gear indicators, anti-lock braking system (ABS) indicators, traction control indicators, airbag (SRS) warning lights, etc. 2. Tachometer: Generally located within the instrument panel, symmetrically placed alongside the speedometer. The tachometer operates based on magnetic principles, receiving pulse signals generated when the primary current in the ignition coil is interrupted. It converts this signal into a displayable RPM value. The faster the engine speed, the more pulses the ignition coil generates, resulting in a higher displayed RPM value. Modern cars typically use electronic tachometers, which come in pointer-type and LCD digital display formats.
