Voltage concern

[99 7.3 in Texas]

What can cause your voltage to jump to about 16 and have the light pop on then drop back?

It did this off and on right now while driving. Pulled over to grab lunch and post this.

[99 7.3 in Texas]

Oh the batteries are a week old

[timmyboy76]

bad alternator, be my guess. Checlk ur connections at batteries..

[LakiPolitis]

Check if any of the lines are chaffing with each other and causing the jump?

"Light pop on then drop back"... which light?

[99 7.3 in Texas]

Sorry about that the check battery light or the voltage the little battery light clicked on and then turned back off. Like a fluctuation. After lunch it never happened again.

I can't recall what could have set it off. I'm not romping it or anything, in fact I'm babying it because of the newly rebuilt tranny that just got put into it.

[Greenman01]

Sounds like voltage regulator in alternator. Check alternator output with voltmeter.

[99 7.3 in Texas]

So far it hasn't spazzed out again...odd..

[BSkopnik]

Don't hold your breath for too long. My 01 started with the alt light. Ended up killing my batteries alt output went for crap. Ended up buying a new one. Just my .02.