Originally Posted by rrich
Was 12, now 14 running - says it's charging.
The fluctuation - are the headlights flickering too?
Try it running and engine off - engine off replace battery.
Try measuring the voltage on the output terminal on the alternator - flickering there too?
Yes, replace alternator.
BUT FIRST - CLEAN AND CHECK THE BATTERY CABLES - BOTH ENDS OF BOTH CABLES! That's easily the major cause of charging system problems.
Haven't checked headlights for flickering. Will do so tonight in the garage. Seems to go from 13v to 13.5v when I give it gas in park.
Will purchase a voltmeter and check the output from the alternator tonight also. Thanks.