trouble with vauxhall vectra elegance 1.8 petrol?

have you thought your alternator is on the way out, I had similar faults when my alt went on my MG

mark homer
September 2009

Test the alternator output, see here for info-

http://www.carbasics.co.uk/How_to_test_your_alternator.htm

Garages and kwik-fit type places will often test free of charge, it only takes a couple of minutes.
Get it tested at a couple of places if they tell you it's not working properly, they have been known to lie to get you to fit a new one!!

spud
August 2009