Voltage dropping after driving

[iLikeEggs]

If you test it when it drops it should be at 12.5v. It's by design and perfectly normal. Nothing to worry about. When it needs more juice it goes up to 14.7v.

 

[MrStimpy]

Same for me, changed alternator thinking it was bad...maddening! Replaced battery too.
This should be in the owners manual.