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Q: Issues with the lights flcikering

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I purchased this pre-owned car and I've been having some issues with the electrical system. There is some flickering and dimming of lights. This happens both outside and inside. I took it to a shop and they had the alternator wire rerouted, so that there would be no interfering. The problem remained the same. Then, they had the alternator replaced as there were high-pitched whining sounds when it was under load. I thought that would solve the issue but it didn't. It did change something however. Instead of flickering, the lights pulsate. What should I do? Thanks.

A: It sounds like the voltage regulator for yo...

It sounds like the voltage regulator for your vehicle is separate from the alternator. Usually the voltage regulator and the alternator are integrated into the same part. If the voltage regulator has failed, the amount of power that all the vehicle’s accessories gets will be inconsistent. This is what may be causing the flickering of your lights. I would recommend having the the car tested to determine if a voltage regulator replacement is necessary. This should relieve all of the symptoms you are experiencing.

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