Ive noticed lately that when im driving along at night if i turn my stereo up the light dim down quite a bit and when there is alot of bass on my sub the lights surge to the beat of the music.
Its also happens when you turn up the fan or use the elec window's.
Is this a sign of my battery on it's way out?
The car still starts fine but was wondering if it's the battery or something else causing this.
Thanks Andy
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