As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOT NOTICED HIGH VOLTAGE LIGHT- ELECTRICS TURNED OFF - RETURNED TO BASE. CONTACT WITH TOWER BY CELL PHONE.- ON INSPECTION AT AMO FACILITY IT WAS LEARNED THAT THE WIRING HARNESS TO THE ALTERNATOR FAILED/SHORTED OUT.- REPAIRS TO THE HARNESS WAS MADE AND THE AIRCRAFT RETURNED TO SERVICE.