What was found
PILOT REPORTED THAT WHILE TAXIING OUT TO RUNWAY 8, NOTICED A FAINT SMELL IN THE CABIN. THEY INITIALLY THOUGHT IT WAS COMING FROM OUTSIDE THE ACFT. THEY THEN REALIZED THE SMELL WAS FROM INSIDE THE CABIN WHEN THEY NOTICED SMOKE COMING FROM BEHIND A PANEL TO THE LT OF THE CAPTAINS SEAT. THE PILOT PULLED OFF THE TAXIWAY, SHUTDOWN, AND EXITED THE ACFT. UPON INSP, MX FOUND THE SMOKE TO BE COMING FROM A FAULTY STARTER RELAY WHICH WAS SUBSEQUENTLY REPLACED.