I've had 2 occasions where my voltmeter on the dash starting indicating a high voltage condition and my info center started beeping and saying check charging system. Both times I didn't have a voltmeter to check the voltage at the battery to confirm the reading, but the problem went away after not running the engine for awhile. Both events occurred about a month apart (approx 15k miles of driving.) I just checked the battery's voltage with the engine running but w/ no accessories on (no a/c, no lights, no anything). I got a reading of 15.05 V. Then I got a reading of 14.99 V after cleaning the voltage reg's connection prongs. My Haynes manual says it shouldn't be over 14.5 V and if it is, change the alternator. Should I? Haynes also says the voltage regulator alone is not replaceable. Is that true? If so, why does the 'Zone's website offer it? It's priced at $70 (a little less than half for an alternator). Thx for any advice.