As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED SMOKE IN COCKPIT. GROUND WIRE FOR INSTRUMENT POST- LIGHTS SHORTED OUT ON WIRE LUG TO 60-AMP CIRCUIT BREAKER FOR ALTERNATOR. REPLACED GROUND WIRE AND RELOCATED AWAY FROM CIRCUIT BREAKER. WIRE LUG ON 60-AMP BREAKER REPLACED. BOTH SYSTEMS CHECKED OKAY. NO OTHER DAMAGE FOUND.