As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
ON CLIMB OUT, LT AC BUSS, LT TRU AND LT ELEVATOR HORN HEAT CAUTION LIGHTS ILLUMINATED. RETURN TO FIELD. INSPECTED BOTH 1 AND 2 ENGINES PROP BRUSH BLOCKS AND CLEANED CONNECTOR PLUGS AS WELL. INSPECTED BOTH ENGINES PROP HEATER LEADS. NO DEFECTS NOTED. GROUND RAN BOTH ENGINES WITH PROP HEAT ON. WINDSHIELD HEAT AND ELEVATOR HORN HEAT ON. LOADS ARE GOOD. OPS CHECKED GOOD.