As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOTS REPORT UPON PLACING LANDING GEAR HANDLE IN DOWN POSITION ON APPROACH, GEAR AND WARNING LIGHTS TWO CIRCUIT BREAKERS TRIPPED AND ALL GEAR INDICATION AND FUNCTION WAS LOST. EMERGENCY GEAR SYSTEM WAS DEPLOYED. ACFT LANDED WITHOUT INCIDENT. TRACED WIRING AND FOUND PINS A AND D SHORTED TOGETHER ON CONNECTOR JW9 AT LT MAIN GEAR UP-LOCK SWITCH. REPAIRED CONNECTOR IAW WIRING MANUAL 20-10-04. INSTALLED NEW CONNECTOR PINS.