Not on my F-car, but on my Honda motorcycle. It died on me today with a flat battery. Battery is about a year old. I had fully recharged the battery a couple of days before as it was flat - this happens from time to time as it has an alarm and doesn't get used as much as it should...if the weather's good I take the 208! Putting a voltmeter across the battery terminals I get: Engine not running 13.4v Engine running 12.95v Engine running and headlight on 12.5v Battery disconnected 13.4v Battery on mains charger 14v So is my alternator shot or what? Could it be the voltage regulator?