Alternator voltage
Today while driving at highway speed, from time to time, I would hear a beep, then my dash would say high voltage. At the time my voltage readout was 13.9 to 14.0. Later when I was coming into Tallahassee on surface streets, my voltage went way up, as high as 17 volts. At the same time my abs light came on, then my check engine light came on. Later still my house control panel showed an error message, voltage too high. Pulled into Wally World , shut everything down, restarted the engine and everything seems normal. Any ideas what could cause this.
I have a cummins 360, in a 2010 Phaeton, on a Freightliner chassis.
Thanks for any help.
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