Lights, gauges cutting out in 2013 386

I have a 2013 386, with 430k miles, that's having electrical issues. As I'm driving, my interior, exterior, and gauge lights and gauges will all die. Even my Jake cuts out, and sometimes the AC blower. After about 30-60 seconds they'll all kick back on. Itll do this 5-6 times a day. My little cheap code reader says "DTC442, Battery circuit fault; ECM voltage above normal range."

I'm thinking it might be an issue with the voltage regulator in my alternator, but since it happens out of the blue, the test meter doesn't help.

Anyone have this issue? Any mechs on here that recognize this issue and can help? Thanks to all.

 

Big thank you fellas, I'll do that. Also, does anyone know where I could get the schematics/repair manuals (in PDF) for this year and model?