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.

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・Fair and transparent pricing

Get a quote

What others are asking

Q: Cruise Control feature doesn't work

The cruise control computer requires inputs from many different systems to function properly. The throttle body sensors, fuel injectors, and throttle plate are all contributors to the cruise control computer readings. If a fault is present in any of these...

Q: Car comes on but engine won't start

Most likely - vehicles don't often fix themselves. A vehicle that cranks but doesn't start indicates a problem with fuel or spark delivery. This could be anything from a failed crank position sensor to a bad fuel pump. On the...

Q: What do you think of Kia as a brand?

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.