Cars started having electircal problems tonight.

First off all it won't start just seems like the batterys flat and won't turn over the engine. it dosn't seem to put enough power out either since the Cd player dies when i work the electric windows,

So i thought the altonator was on its way out, but the car runs ok and i just done a hour journey so it must be still charging the battery or engined would have conked out, i put a volt meter across it yesterday since the igition light was flickering for a couple of secs every hour or so of use, and it was putting out 14v's so it look like it was chargin fine,

It funny becasue when u bump start it and switch of the engine it stars again no prob its just after u do a journey in it, it won't start again, also the ignition light comes on when the keys are out of the ignition, any one have any ideas could this be a earthing fault, also the cd player wired off the igion barrel for it's live feed.

Could it be the altanator on its way out or could it be a wiring problem i just spoke to someone from the RS owners club who i saw in town and he had no idea, u got any clues cheers BAZ.