As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
SMOKE WAS NOTICED IN THE COCKPIT WHILE PREPARING FOR DEPARTURE. SMOKE DISSIPATED WHILE TAXING BACK TO FBO. CREW NOTICED THE WINDSHIELD WIPER CIRCUIT BREAKER WAS EXTENDED. MAINTENANCE ISOLATED THE DISCREPANCY TO A FAULTY WINDSHIELD WIPER SWITCH. SWITCH WAS REPLACED, SYSTEM OPERATION WAS NORMAL AND THE AIRCRAFT WAS RETURNED TO SERVICE.