What was found
CREW REPORTED BURNING ELECTRICAL ODOR FLOWED THROUGH COCKPIT. ALL NON-ESSENTIAL EQUIPMENT WAS TURNED OFF. SHORTLY AFTER, A SMALL STREAM OFF SMOKE AROSE FROM AREA JUST FWD OF THROTTLE LEVERS. IFR CLEARANCE CANCELLED, DIVERTED, AFTER COMPLYING WITH SMOKE IN THE COCKPIT CHECKLIST. LANDED WITHOUT INCIDENT. MX INSPECTED ACFT AND FOUND COCKPIT LIGHTING CONTROL DIMMER ASSY DAY/NIGHT SWITCH BURNED. R & R DIMMER ASSY, RELEASED ACFT BACK TO SERVICE.