Yep... Kakatawa naman yung SA... Pinipilit niya talaga yung baluktot niyang paniniwala at reasoning...12.7 volts is not normal with standard oem load..
If me technical manual sila, meron yang factory spec of what the alternator readings should be.... Analog tester or digital tester are fairly accurate..

Hahaha... Galing talaga ng s.a,, pag papa warranty client dame dahilan,,,
Onga sir, pull out mo muna habang wala pa service alternator,, baka ma-hocus pocus yan.. Hihihi...