Car Dish Board Symbol Indicator Light

There is often an indicator light on a key switch of household lighting. The resistance of this kind of indicator light is extremely large, so that the current in the circuit is extremely small, so that the voltage of the electric appliance cannot reach the rated voltage at night and cannot light up. Generally, there is a capacitor in this kind of indicator light because of a small The indicator light can not tolerate 220v voltage.

basic concepts

A device that uses lights to monitor the working or position status of circuits and electrical equipment. The indicator light is usually used to reflect the working state of the circuit (powered or not), the working state of the electrical equipment (running, out of service, or test) and position state (closed or open), etc.

The indicator light using incandescent lamp as the light source is composed of lamp cap, bulb, lampshade and connecting wire, etc. There are also light-emitting diodes as indicator light, which are generally installed on the panels of high and low voltage power distribution devices, panels, tables and cabinets. On the panel of some low-voltage electrical equipment, instruments or other conspicuous locations. The indicator light that reflects the working status of the equipment, usually a red light is on to indicate that it is in operation, a green light is on to indicate that it is in a state of shutdown, and a milky white light is on to indicate that it is in a test state; Off means that the equipment is de-energized; the indicator light that reflects the working status of the circuit, usually a red light on means live, and a green light on means no electricity. In order to avoid misjudgment, check the condition of the bulb or light-emitting diode frequently or regularly during operation.

The rated working voltage of the indicator lamp is 220, 110, 48, 36, 24, 12, 6, 3 V and so on. Limited by the current through the control circuit, and in order to prolong the service life of the bulb, it is often adopted to add a current-limiting resistor in front of the bulb or use two bulbs in series to reduce the operating voltage.

Introduction

Installed on the dashboard in the cab, the number depends on the design. It is used to indicate related lighting, light signals, and the technical status of the working system, and to send out warning light signals for abnormal conditions.

As shown in the figure, there is often an indicator light on a key switch of a household lighting lamp. In actual use, it is found that when the switch is closed, only the lighting lamp emits light; when the switch is disconnected, the lighting lamp is off, and the indicator light will emit a faint light to display the position of the switch at night. According to the control characteristics of this key switch, the connection mode of the lighting lamp (A) and the indicator lamp (B) can be correctly indicated.

Car indicator light

Engine fault indicator

The engine failure indicator is represented by CHECK ENGINE or MIL. It has two states and indications. One is always on, indicating that the engine electronic control system has malfunctioned; the other is flashing, indicating that the malfunction is still affecting the engine. Performance (such as exhaust emissions, etc.)

 

Replace lubricating oil indicator

The oil change indicator is indicated by “CHANGE OIL'”. For example, the “CHANGE OIL'” lamp on the dashboard of a Buick station wagon is on to remind the driver that “the oil should be changed”. After changing the oil, the indicator light should be “zeroed”.

 

Temperature warning light

Exhaust temperature, warning light Modern cars have a three-way catalytic converter, so the exhaust temperature has increased, but too high exhaust temperature can easily cause damage to the three-way catalytic converter, so this type of car is also equipped with exhaust Temperature warning device. When the exhaust temperature warning light is on, the driver should immediately reduce the speed or stop. When the exhaust temperature drops, the warning light will automatically go out (but after the fuse exhaust temperature warning light is on, if it doesn’t If the exhaust temperature warning light does not go out, you should find out the cause and eliminate the fault before continuing to drive.

 

Brake warning light

The brake warning light is red, and the pattern is a “!” symbol inside the circle. If the red brake warning light is on, it means one of the following conditions exists in the brake system:

(1) The friction plate of the brake is severely worn;

(2) The brake fluid level is too low;

(3) The parking brake has been tightened (the parking brake switch is closed);

(4) Under normal circumstances, if the red brake warning light is on, the ABS warning light will light up at the same time, because the ABS system cannot play its due role even if the conventional brake system fails.

 

Seat belt not fastened warning light

The seat belt is not fastened warning light is indicated by a graphic (a seat belt diagonally across the occupant’s chest). After the ignition switch is turned on (ON), if the driver is not wearing a seat belt, the warning light will light up to remind the driver People fasten their seat belts. If the seat belt is not fastened and the warning light does not light up under any circumstances, check whether the fuse of the light is blown, whether the bulb is burned out, and whether the line voltage meets the regulations.

Hazard warning lights

Hazard warning lights are used to warn other vehicles and pedestrians when the car has a major failure or emergency. The hazard warning signal is represented by the front, rear, left and right turn signals flashing at the same time.

The hazard warning light is controlled by an independent switch, and generally shares a flasher with the turn signal light. When the hazard warning light switch is turned on, the turn signal circuits on both sides are turned on at the same time, and the front, rear, left and right turn signals and the left and right turn indicators on the dashboard flash simultaneously. Since the hazard warning light switch connects the flasher to the battery, the hazard warning signal can also be used when the ignition switch is turned off (OFF) and parking.

effect

  1. Oil indicator

The function of the indicator light is to display the oil pressure condition in the engine. When the key door is opened, the indicator light is on when the vehicle self-checks, and it goes out after starting. According to the Gangcheng Driving School, the indicator light is always on, indicating that the engine oil pressure of the car is below the prescribed standard and needs maintenance.

  1. Water temperature indicator

The water temperature indicator lamp mainly displays the temperature of the coolant in the engine. It only lights up for a few seconds during the vehicle self-check, and is usually off. Usually we hear a lot of so-called engine “boiling”, which means that the temperature of the coolant exceeds the specified value, and the driving should be suspended immediately for maintenance.

  1. Handbrake indicator

The easiest mistake made by novices is that the handbrake is turned on but not released. The indicator is a circle! Or the letter P, it is usually off. When the handbrake is pulled up, the indicator light automatically lights up. At present, only some models have a warning sound that the handbrake is not used when driving.

  1. Battery indicator

The battery life of a new car is at least two years, but if it is a used car or a stock car, you need to pay attention to this indicator in advance. This light is also on during vehicle self-checking and goes out after starting. If the indicator light is always on after startup, it means the battery needs to be replaced.

  1. ABS indicator

The ABS light does not flash when the engine is turned on or does not go out after starting, indicating that the ABS is malfunctioning.

  1. Seat belt indicator

The indicator light showing the status of the seat belt, depending on the model, the light will be on for a few seconds to give a reminder, or it will not go out until the seat belt is fastened, and some cars will also have a sound prompt.

  1. Engine working status indicator

It lights up after switching on the switch, and goes out after about 3-4 seconds, and the engine is normal. If it is not on or keeps on, it means that the engine is faulty and needs to be overhauled in time.

  1. Brake indicator

The function of this car indicator is to show the brake disc wear and the status of the brake system. If it is always on, the brake system should be checked immediately.

  1. Refuel indicator

Seeing this light is on, it means that the amount of fuel in the fuel tank is low, and it is best to enter the gas station immediately.

  1. Airbag indicator

The airbag indicator light is an indicator light that shows the working status of the airbag. It lights up when the switch is turned on and goes out after about 3-4 seconds, indicating that the system is normal. If it is not on or constant, it indicates that the system is faulty.