Coming home from a car show last week on a very hot day, I turned on the A/C.
 
	Worked fine and then I notice a 11 volt reading on  dash volt meter. shut off A/c and it went back to 12 volts. Has always read 12 volts while normal operation.
 
	Noticed same with lights on.
 
	Did a reading on battery, with multi meter, not running, read 12.6 volts .
 
	Started car, read 14.2 on multimeter at idle. Gauge in car at 12 volts.
 
	Turned on lights and A/C while idling, gauge in car dropped to 11 volts, multimeter read 14.0.
 
	Appears charging system works fine, never had any starting issues, so probably bad gauge?
 
	If so I can ignore till I have a need to tear into dash which needs a few light bulbs.
 
	Opinions??
 
	 
 
	Dan