I just rec'd my ltr. from Fiat that my alternator replacement has been approved & to call local dealer to sched. an appt. Mabey I'm just behind times but I have now been given approval. I have been using a digital volt meter (basic plug into cig. lighter type) but it is rather accurate & has never shown anything but a positive charge within 14.2 to 14.5 even under heavy load conditions with lighter lights heated seates idle in traffic etc. so mabey I have a good one at least until it ever might catch on fire!!