Skip the auto shop - Our mechanics make house calls

Q: Left brake light not coming on

asked by on

My left brake light will not come on. It is not a problem with the bulb. I have had a few people say it could be an issue with the internal computer.

A: The most common reason is usually the bulb....

The most common reason is usually the bulb. Other causes of the brake light not lighting is the wiring or possibly a fuse on that side of the vehicle. A qualified technician, such as one of our YourMechanic experts, can diagnose this issue by checking for power at the bulb and working back from there.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Save up to 30%

Get a quote

What others are asking

Q: Brake lights don't work

Some brake lights and turn signals share the same circuit, but looking at the wiring diagram for your vehicle, I see that this is not the case; there are two separate circuits. My guess is that the fuse is blown....

Q: Transmission making grinding noise when downshifting

If your vehicle is a standard, you can have a bad synchronizer in your transmission. The synchronizers are typically made of brass and are what make shifting from one gear to the other smooth. When they wear they make shifting...

Q: Noise from engine belts

It kinda sounds like the belt on your 2005 Kia Spectra5 may be too loose and is slipping rather than turning the accessories, such as the power steering pump. You may have the wrong belt installed or not have it...

Related articles

How to Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...