What was found
ON ARRIVAL PASSING 10K FEET, THE PAX SAFETY SWITCH WAS SELECTED TO THE ON POSITION AND NONE OF THE APPROPRIATE LIGHTS TURNED ON IN THE CABIN AND WE WERE UNABLE TO SEE THE EXTERIOR WING LIGHT. ON THE GROUND WE TURNED THE EMER LTS SWITCH TO ON AND THE LIGHTS CAME ON. WE THEN ATTEMPTED THE PAX SAFETY SWITCH AGAIN WITH THE SAME NEGATIVE RESULT. COULD NOT DUPLICATE. OPS CHECKS GOOD. IAW CE-700 AMM 33-20-00