As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) PILOTS REPORTED THAT AIR GROUND WARNING LIGHT WOULD COME ON OCCASIONALLY AFTER TAKEOFF AND THEN GO AWAY. MAINTENANCE FOUND THE PINS IN CONNECTOR PB101 LT FUSELAGE WING CORRODED. PINS M, V, AND K WERE REPLACED. SYSTEM FUNCTION CHECKED SERVICEABLE.