What was found
WHEN SELECTING THE LANDING GEAR DOWN DURING APPROACH, THE GREEN LIGHT FOR THE LEFT MAIN GEAR DID NOT COME ON. FOUND LT MLG DOWN LOCK SWITCH READING HIGH RESISTANCE (75 OHM) TAPPED ON SWITCH AND READING FLUCTUATED TO (160 OHM), REPLACED LT MLG ACTAUTOR IAW MM 32-10-00, OPS & LEAK CHECK GOOD.