Toyota Yaris Replacing Burned Out Bulbs Too Often – What Are the Possible Causes?

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Toyota Yaris Replacing Burned Out Bulbs Too Often – What Are the Possible Causes?

Hello,

I’ve been dealing with burned out bulbs in my Toyota Yaris on a regular basis, especially with the brake lights. I’ve replaced them several times in the last few months, but they keep going out.

Could it be related to a grounding issue o r something with the electrical system? Has anyone else had this happen, and what steps did you take to resolve it?

Looking forward to your feedback!

Zarnish asked on 29 Jan 2025 11:06:17 am

1 Answer

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Car Mechanic Expert - on 29 Jan 2025 11:13:16 am

It’s possible that a grounding issue o r a fault in the electrical system could be causing the brake light bulbs to burn out repeatedly. When the ground connection is loose o r corroded, it can cause excess voltage o r electrical surges that lead to bulb failure. Here are a few steps to consider:

Check the Ground Connection: Inspect the ground wire for the brake lights. If its loose, corroded, o r damaged, it can cause electrical problems that may lead to frequent bulb failures.

Inspect the Wiring: Look for any frayed, pinched, o r shorted wiring that could cause a surge in electrical current, leading to the bulbs burning out.

Examine the Socket: Sometimes, the bulb socket itself can become corroded o r worn, leading to poor contact and electrical surges. Clean o r replace the socket if necessary.

Voltage Test: Use a multimeter to check the voltage going to the brake light bulbs. If the voltage exceeds the recommended range 12-14 volts, you may have a faulty alternator o r voltage regulator that is sending too much power to the bulbs.

If you’re unsure how to check these, it might be worth having a professional mechanic inspect the electrical system. Resolving the grounding o r wiring issue should help prevent further bulb burnout.