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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 821 (Handles, Locks, Latches And Entry Systems (F250-F550)) >> Diagnostic Tests >> Locks, Latches and Entry Systems - Non Module Controlled >> Pinpoint Tests >> Pinpoint Test D: The Door Locks Operate Only One Way >> Pinpoint Test D: The Door Locks Operate Only One Way

Pinpoint Test D: The Door Locks Operate Only One Way

WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.
  1. D1 CHECK CIRCUIT 57 (BK) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Driver Door Lock Control Switch C505
      • Fig 1: Checking Circuit For Open
      GF0005278Courtesy of FORD MOTOR CO.
    • Measure the resistance between the driver door lock control switch C505-2, circuit 57 (BK), harness side and ground; and between the driver door lock control switch C505-8, circuit 57 (BK), harness side and ground.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  D2.
    2. NO  : REPAIR the circuit in question. TEST the system for normal operation.
  2. D2 CHECK CIRCUIT 119 (PK/YE) FOR AN OPEN 
    • Disconnect: Passenger Door Lock Control Switch C605
      • Fig 2: Checking Circuit For Open
      GF0005281Courtesy of FORD MOTOR CO.
    • Measure the resistance between the driver door lock control switch C505-7, circuit 119 (PK/YE), harness side and the passenger door lock control switch C605-8, circuit 119 (PK/YE), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  D3.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. D3 CHECK CIRCUIT 120 (PK/LG) FOR AN OPEN 
      Fig 3: Checking Circuit For Open
      GF0005282Courtesy of FORD MOTOR CO.
    • Measure the resistance between the passenger door lock control switch C605-2, circuit 120 (PK/LG), harness side and the driver door lock control switch C505-3, circuit 120 (PK/LG), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new driver door lock control switch. REFER to Door Lock Control Switch . TEST the system for normal operation.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
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