left side of the car the brake light is not coming on?

1998 VOLVO S40
79,000 MILES
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on the left side of the car the brake light is not coming on but the bulb is good i have inspected the board for corrosion and the bulb is tight i am not sure what it could be i have also checked the hayes manual electrical dia and the brake wiring connects to the fault diagnosis panel connected to dash please give me some suggestions.
Jan 15, 2013 at 10:47 AM
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SQM
  • ✓Experienced Mechanic
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Hello,

First check to see if you are getting power to the socket.
It is possible to have bad ground. Ground wires can get corroded or loose overtime. And will create an open and the bulb will not function.

Another possibility is a short in the power wire that goes to that side of the vehicle.

https://www.2carpros.com/articles/how-to-check-wiring

I have attached a diagram showing the location of the ground cable.

Please let me know if you have any questions.
Thank you.
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Jan 6, 2022 at 5:24 AM
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