New Interstate battery, new alternator (x2, 1st was Napa (DOA), 2nd Motor Craft) and 1 new Napa idler wheel. The battery test at 12.5 and when the truck idles it shoot to 15.14. It holds a charge fine, but the check charging system keeps popping up which concerns me, not only because its annoying. Also why such a spike when started... Anyone have any ideas??? Thanks in advance!

 

bad ground maybe??