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lights flicker

Electrical and Electronic

Vehicle Information: Model: 964 C4; Year: 1989; Body Type: Coupe; Engine (type, size, modifications): 3.6 - cone air filter; Total Mileage: 101,000;

Good Morning,I have a question about an electrical problem that I have noticed. The problem is most evident at night when my lights are on. The lights (both interior and headlights) are normally dim and they will momentarily flicker brighter when I drive over a bump. It seems like this would be caused by a bad alternator. Is there another possible problem that I should look at before swapping the alternator? The battery is staying charged and the battery light is not on.thank you for your time,Ken

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