i have a audi a3 and have noticed a fault with my lights. my left front headlamp is brighter than the right. this is all the bulbs fog, side and main. changed all the bulbs and still no luck. any ideas please?
Sounds like a bad earth - quite likely with an aluminium body. Run an earth wire from any of the bulbs straight to the battery negative to double check.
If the lights go brighter, you have a bad earth.
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