What is a high-mounted brake light
The high-mounted brake light (also known as the third brake light or high-mounted brake light) is an auxiliary braking signal device installed above the rear of a vehicle. It is mainly used to enhance the braking warning effect and reduce the risk of rear-end collisions. Youdaoplaceholder0 is characterized by high position, high visibility, and usually uses LED light sources, and is subject to mandatory installation by many countries' regulations.
Youdaoplaceholder0 Definitions and basic functions
The high-mounted brake light is a supplementary device to the traditional brake light, installed on the upper part of the rear of the vehicle (such as the trunk lid, rear windshield or roof), and transmits braking signals to the vehicles behind through a more prominent position and brightness. Youdaoplaceholder0 Its core function is to make up for the shortcomings of traditional brake lights that are low and easily blocked, especially to significantly improve warning effect in foggy weather, at night or when there is a close distance professional statistics show that it can reduce rear-end collisions by about 4.3%.
The following is a video about the definition of high-mounted brake lights:
Youdaoplaceholder0 Location and design features
Youdaoplaceholder0 Location select :
The center line of the vehicle or the upper part of the rear window ensures that vehicles of different heights behind can all be clearly seen.
Common shapes include long strips, circles, etc., which need to be in harmony with the vehicle body design.
Youdaoplaceholder0 Light source type :
Youdaoplaceholder0 LED light source : Mainstream choice, long lifespan (about 8000 hours), pollution-free, but higher cost.
Youdaoplaceholder0 Traditional incandescent lamp : mature technology but high energy consumption and prone to damage.
The following is a video about the installation of high-mounted brake lights:
Youdaoplaceholder0 Safety advantages and regulatory requirements
Youdaoplaceholder0 Field of view coverage : The width of the light band usually occupies the rear window and is effective for both low chassis vehicles (such as cars) and high chassis vehicles (such as trucks).
Youdaoplaceholder0 Regulations mandate : The United States has required new vehicles to be equipped with this system since 1986, and countries like China have gradually incorporated safety standards.
The high-mounted brake light is a key component for vehicle safety. Its main function is to ensure that the driver behind can quickly detect the braking action of the vehicle in front, thereby effectively reducing the occurrence of rear-end collisions.
The high-mounted brake light, also known as the third brake light or high-mounted brake light, is usually installed at a higher position at the rear of the vehicle. This design enables vehicles of different chassis heights, such as trucks, buses, coaches, as well as cars and microcars, to be more easily identified by drivers behind them. Especially in complex traffic environments, such as busy urban roads or expressways, its importance becomes even more prominent.
High-mounted brake lights can be classified into gas high-mounted brake lights and LED high-mounted brake lights based on different light-emitting materials. The former emits light through gas discharge, while the latter adopts advanced light-emitting diode technology and has the advantages of rapid response, excellent brightness and low energy consumption.
For vehicles without high-mounted brake lights, especially when braking, due to the lower position of the rear brake light, its brightness is often not sufficient to be detected by vehicles with higher chassis behind, which undoubtedly increases the risk of traffic accidents. Therefore, in order to enhance driving safety, it is strongly recommended that all vehicles be equipped with high-mounted brake lights. Even when permitted, car owners should consider installing high-mounted brake lights by themselves to enhance vehicle safety and reduce the possibility of traffic accidents.
The solutions to the malfunction of the high-position brake light mainly include troubleshooting the bulb damage, checking the circuit connection, testing the control module and replacing the relevant components. Youdaoplaceholder0 The specific cause of the problem may involve bulb aging, short circuit/loose connection of the circuit, brake light switch failure or relay abnormality, etc. It needs to be diagnosed step by step according to the actual situation.
Youdaoplaceholder0 High-mounted brake light fault solution steps
Youdaoplaceholder0 Initial Symptom confirmation .
When the ACC is powered on (without the need for ignition), observe whether the high-mounted brake light lights up normally when you step on the brake. You can set up a mobile phone at the rear of the vehicle to record and assist in the check.
Youdaoplaceholder0 Common Fault diagnosis and treatment .
Youdaoplaceholder0 Bulb damaged : Replace when LED or halogen bulbs burn out. High-position brake lights are mostly red round or long strip light groups. Pay attention to the interface type when disassembling and assembling.
Youdaoplaceholder0 Line problem :
Check for any open circuits, short circuits or loose plugs in the wiring, with a focus on inspecting the easily worn wiring harness at the opening and closing of the trunk lid.
If a slightly bright phenomenon (such as dim light) is detected, it may be caused by the characteristics of the solid-state relay. The voltage of the relay pins needs to be checked (the normal control terminal voltage should be ≥12V).
Youdaoplaceholder0 Brake light switch failure : Located near the brake pedal. If the switch is damaged, the signal will not be transmitted to the control module. The switch needs to be replaced.
Youdaoplaceholder0 Control module anomaly :
Use the OBD2 diagnostic instrument to read the fault code and check whether the body control module (NBC) or the brake control module (NFR) is abnormal.
If the output signal of the module is incorrect (such as continuous micro-voltage), the module needs to be replaced or reprogrammed.
Youdaoplaceholder0 Special case handling .
Youdaoplaceholder0 Brake system-related failure : If accompanied by a decrease in braking force or an ABS alarm, check the brake fluid level, brake pad thickness and system sealing, replenish the fluid or replace worn parts.
The following is a video about the solution to the high-position brake light fault:
Youdaoplaceholder0 Notes
Youdaoplaceholder0 Safety First : Faulty brake lights pose a risk of rear-end collision. It is recommended to fix them first before driving.
Youdaoplaceholder0 Professional assistance : When it comes to replacing circuit modules or relays, if you have no experience, contact 4S store or professional maintenance personnel.
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