Ammeter Maxed

I'm thinking that WHEN YOU WIRED IN THE electric fans you got them wired in such a way that the ammeter no longer reads correctly

"Electrically speaking" the alternator output and all accessories/ loads connect to one side of the ammeter, and ONLY the battery connects to the other side.

To put this more practically, if you hook something a large load to the battery or to the starter relay "big stud" the ammeter will no longer read properly

ALSO if you are running "big fans" and have a stock unmodified ammeter circuit YOU NEED TO READ THIS ARTICLE and do a bypass

Catalog

Many on here don't agree with how that article bypass is done, and you can use a bypass wire from the alternator output to the battery BUT YOU MUST protect it or breaker it

Toomanmike is right----------you need to monitor battery/ system voltage at the battery AFTER THE BATTERY is warmed and "normalized" and see what the system voltage actually runs for voltage. You want no lower than 13.5 or so and no higher than 15 or so. "Normal warm" is 13.8---14.2

ANOTHER issue is that the voltage regulator may not be getting 'full' battery voltage at the IGN terminal of the VR which is the sensing.