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Q: Left brake light not coming on

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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.

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