i went outside to clean the inside of my glass around 20mins ago and started up the car to give it a run after, it started making this strange noise that to me just sounded like a squeaking sound more or less it was a really high pitch sound.
after driving for about a mile the battery light came on so i decided to turn around and head back home just incase it stopped on me. The sound was still going all the time it was being driven.
The cars a 2005 Signum 2.0DTI on around 75,000miles
i think it could be the alternator after a quick search on here but would just like to know what others think.