Alternator Issues - Maybe?

[JTodd]

I have noticed some strange behavior with the volt gauge. It will usually be right at 14. Lately, I have noticed that it will dip occasionally to almost 10, but never into the red. It will stay there for a while, then slowly climb and drop as I drive. The fluctuations are not rapid. All this with lights and fans off. Today, while sitting at a stoplight I noticed it

[sturgeon-phish]

Swing by autozone and have the battery and Alternator checked.
Jim

[a5150nut]

You might want to check all engine grounds. Battery cable ends, positive and grounds to block and grounds at the passenger side rear of engine. Also check positive connection to alternator.