As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) IN-FLIGHT AT NIGHT THE PILOT NOTICED SPARKS COMING FROM UNDER THE CENTER RT EDGE OF THE INSTRUMENT PANEL. WORK HAD BEEN DONE ON RADIOS. SOLDER CONNECTION ON THE 1,00O HMS RESISTOR CONNECTING THE L20N WIRE FROM THE LT AND RT LIGHT SWITCHES TO THE SOLID STATE DIMMER WERE BARE. REPAIRED.