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C143A - DIFFERENTIAL/LOCKER SELECT SWITCH PERFORMANCE (CONTINUED) 3. (T535) LOCKER SWITCH SENSE CIRCUIT OPEN Disconnect the FDCM harness connector. Measure the resistance of the (T535) Locker Switch Sense circuit Is the resistance below 5.0 ohms? Yes >> Go To 4 No >> Repair the open or high resistance in the (T535) Locker Switch Sense circuit. Perform FDCM VERIFICATION TEST. 4. (537) LOCKER SWITCH SUPPLY CIRCUIT OPEN Measure the resistance of the (T537) Locker Switch Supply circuit Is the resistance below 5.0 ohms? Yes >> Replace the FDCM in accordance with the Service Infor- mation Perform FDCM VERIFICATION TEST. No >> Repair the open or high resistance in the (T537) Locker Switch Supply circuit. Perform FDCM VERIFICATION TEST. 3 - 4 DIFFERENTIAL & DRIVELINE - ELECTRICAL DIAGNOSTICS DR/DH |