I have a 2007.5 6.7 megacab and when i first start it it will charge 14 volts for a few seconds then it goes down to 12 then back up to 14 a couple of times after it does this itt stays at 14 volts is this normal or what thanks in advance for any ideas

THANKS I JUST READ THIS ON ANOTHER POST THIS SITE ROCKS THANKS TO ALL OF YOU

 

Welcome to the forum..

The grid heater is cycling, which cause the lights and voltage to fluctuate. perfectly normal..

 

Yup all good, normal, mine doesnt do it any more, hahaha winter in Arizona.

 

You know how to hurt a guy don't you -30 so far here...