Skip the auto shop - Our mechanics make house calls

Q: Two rear brake lights are not working. The top one is.

asked by on

Is the brake light switch connected directly to the brake lights? So that my issue is between the brake light switch and the bulbs? I have checked the brake light switch and power supply to it. They are fine.

My car has 260000 miles.
My car has a manual transmission.

A: Hi there. Having power to the brake light s...

Hi there. Having power to the brake light switch leads me away from a fuse related issue. Not knowing the model, makes it difficult to know whether the brake light switch is two wire or multiple wire. If it's a two-wire switch, we know the switch is working, as the third light works. This would lead me to believe the junction for the stop lights may have a problem or the brake light bulbs have burnt.

For a multiple wire switch, the upper and lower brake light bulbs may have separate circuits in the switch, and the brake light switch may be at fault.

If you need more in-depth help, I recommend having your vehicle's brake light problem diagnosed and repaired by a certified technician, such as one from YourMechanic.

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: When I open my doors the interior lights don't come on.

Hello. Without knowing the make and model of your vehicle, it hard to definitively give insight on the exact component that has failed. In general, when the door is opened, the switch turns on the interior lights. If the lights...

Q: Horn and brake lights not working

Hello. The issues you are having are likely being caused by two separate things, but it is possible that shorted wiring is affecting both. A technician can examine the brake pedal switch, and also test the voltage coming to the...

Q: Car makes a noise when I accelerate

Some noise from these engines is considered normal, especially on cold start. The noise is often the result of "piston slap" caused by excessive piston to cylinder wall clearance. The noise goes away when the engine warms up and the...

Related articles

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...
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...
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...