What was found
PRIOR TO ROLLOUT, PILOT ACTIVATED THE PULSELIGHT SWITCH. AS HE WAS ON ROLLOUT, THERE WAS SMOKE IN THE CABIN. PILOT ABORTED TAKEOFF AND THE AIRCRAFT WAS TAKEN TO MAINTENANCE. THE TECH FOUND THE INSTALLATION NOT TO BE IAW THE STC INSTALLATION INSTRUCTIONS. (THERE WAS NO CIRCUIT BREAKER INSTALLED). MAINTENANCE INSTALLED THE PROPER CIRCUIT BREAKER, REPLACED THE BURNED WIRES AND RETURNED THE AIRCRAFT TO SERVICE.