In life, we sometimes encounter the situation that the car brake light are not bright. The
following are some solutions to the brake lights that are not bright.
1. Check the brake bulb
The most frequently used car is the brake light. The service life of the light bulb is relatively short. When the
brake light of the car is not lit, the first thing that comes to mind is the brake light bulb. Replace the light bulb.
2. Check the brake light switch
If the brake light switch is faulty, all the brake lights will not be on. You can use a wire to connect the brake
light switch during maintenance. If the brake light is on, it means that the switch is broken. Replace the
switch to solve the problem.
3. Check the fuse
After the light bulb and the switch are determined to be fault-free, the fuse should be checked. Some cars
do not have a separate brake light fuse and share a fuse with other electrical equipment. At this time,
you can check the operation of other electrical equipment on the car and check for non-operation For
electrical equipment, replace the corresponding fuse.
4. Check the brake light ground wire
The tail lights on the car share a ground wire. If the ground wire is broken or connected in a virtual
manner, it will also cause the brake light to be off, so you must not forget to check the ground wire.
5. The brake light harness is broken
Brake light is not a relatively simple problem, but sometimes we have replaced or checked the light bulb,
switch, insurance, plug, the fault is still the same, then check the brake light harness step by step, you
can first measure whether the switch to the plug harness Turn on, then measure whether the plug to the
bulb harness is normal, so that the inspection range is gradually narrowed, and the fault point can be
There is a small trick. In fact, you can check whether the high brake light is on or off to determine
whether the brake light is on. If there is no power, just check the switch or insurance.
Introduction of other failures of brake lights
1. The brake light is always on
Most of the time the brake light is always on because the brake light switch is malfunctioning, or because the
circuit is shorted, so generally check the brake light switch and the brake circuit.
2. The brake lights are sometimes off and sometimes on
When the brake is pressed, the brake light sometimes does not light up and sometimes lights up. The cause of
this failure is mostly due to poor contact of the wire, which makes the brake light unable to indicate normally.
There is also a reason for the brake light bulb. The filament of the brake light bulb has been ablated and
cannot work properly Glow.
3. The brake lights are on and off
Brake lights turn on and off one by one. This failure is often encountered. Note that it is the cause of the
brake light bulb. It can be solved by replacing the brake light bulb.
Note: Two car brake lights must be replaced at the same time, in order to prevent the filament ablation from
varying degrees, resulting in one bright and one non-bright phenomenon. However, you can keep a good light
bulb in the car in case of unexpected needs.