Can a faulty alternator cause the bulbs in my Suzuki Alto to burn out?

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Can a faulty alternator cause the bulbs in my Suzuki Alto to burn out?

I recently replaced the bulbs in my Suzuki Alto, but they keep burning out quickly. Someone mentioned that a faulty alternator could be the cause, causing voltage spikes that damage the bulbs. Is this true, and how can I check if the alternator is the problem?

Gari Specialist asked on 20 Feb 2025 12:27:17 pm

1 Answer

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Gari Master - on 20 Feb 2025 12:37:24 pm

Yes, a faulty alternator can cause bulb burnouts. The alternator is responsible for regulating the voltage supply to various electrical components in your vehicle, including the headlights. If the alternator is malfunctioning o r the voltage regulator is damaged, it may cause voltage spikes o r overcharging, which can burn out the bulbs prematurely.

How to check:

Test the alternator: Use a multimeter to check the voltage coming from the alternator. It should be around 13.5 to 14.5 volts. If it is higher than this range, it could indicate a problem.
If you notice fluctuating voltages o r an increase in bulb failures, you may need to replace the alternator o r voltage regulator.
Solution:

Replace the faulty alternator o r voltage regulator to prevent further damage to the bulbs.
Consider checking the wiring for any issues that might cause irregular electrical flows.