What was found
DURING ROUTINE COCKPIT INSPECTION WITH MAIN BATTERY ON, AILERON TRIM BOUND DURING CHECK, AUTOPILOT SERVO CIRCUIT BREAKER TRIPPED & SMOKE WAS DETECTED. TRIM KNOB WAS ROLLED TO RT THEN BOUND & STUCK 2/3 OF THE WAY. TRIM KNOB WAS THEN ROLLED LT PAST NEUTRAL, BOUND AT 1/4 OF THE WAY. AT THAT POINT ALL CTR PEDESTAL LIGHTING & SFD ILLUMINATED BEYOND FULL BRIGHT, DAY & NIGHT SWITCH OFF, THEN WENT DARK THEN SMOKE WAS DETECTED, AND CIRCUIT BREAKER TRIPPED. TROUBLESHOT & FOUND AUTOPILOT CONTROLLER WIRES INTERFERING WITH AILERON TRIM CENTRAL ROD IN PEDESTAL. BACK LIGHTING WIRES FOR AUTOPILOT CONTROLLER WERE WRAPPED AROUND TRIM ROD & BRAKE CAUSING SMELL. REPAIRED WIRES & SECURED WIRE BUNDLE TO PREVENT FURTHER INTERFERENCE. BACK LIGHTING & AUTOPILOT OPS CHECKS WERE SATISFACTORY. AILERON TRIM CHECKED SATISFACTORY WORK DONE IAW WD 20-10-03.