What was found
AFTER LANDING ROLLOUT AND AT APPROX TAXI SPEED, THE PILOT ENGAGED THE NOSE WHEEL STEERING SYS AND IMMEDIATELY ENCOUNTERED AN UNCOMMANDED HARD LT TURN. THE PILOT WAS ABLE TO STOP THE ACFT WITH ONLY THE NOSE WHEEL OFF THE EDGE OF THE RUNWAY. THE ACFT WAS PUSHED BACK ON THE RUNWAY AND TOWED TO MX. THE HYD MULE WAS CONNECTED TO THE ACFT AND THE NOSE WHEEL SYS ACTIVATED WHICH OPERATED NORMALLY. THE WIRING HARNESSES AND CONNECTOR PINS AND SOCKETS WERE INDIVIDUALLY CHECKED WITH NO PROBLEMS NOTED. AFTER SEVERAL ATTEMPTS, THE PROBLEM COULD NOT BE DUPLICATED. MX WAS UNABLE TO DETERMINE THE CAUSE AT THIS TIME.