Pinpoint Test G: A Single Illumination Source Is Inoperative - Door Lock Control Switches

G1 VERIFY THE POWER DOOR LOCK OPERATION
- Key in ON position.
- Operate and verify power door lock operation.
- Do the power door locks operate correctly?
- Yes : GO to G2.
- No : REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS .
G2 CHECK POWER TO THE WINDOW CONTROL SWITCH - CIRCUIT 194 (PK)
- Key in OFF position.
- Disconnect: Door Lock Control Switch C605 (RH) or C505 (LH).
- Key in ON position.
- Measure the voltage between the door lock control switch C505 (LH) or C605 (RH) pin 5, circuit 194 (PK), harness side and ground.
  
  Fig 1: Measuring Voltage Between Door Lock Control Switch C505 (LH) Or C605 (RH) Pin 5, Circuit 194 (PK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to G3.
- No : REPAIR the circuit. TEST the system for normal operation.
G3 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between the door lock control switch C505 (LH) or C605 (RH) pin 1, circuit 57 (BK), harness side and ground.
  
  Fig 2: Measuring Resistance Between Door Lock Control Switch C505 (LH) Or C605 (RH) Pin 1, Circuit 57 (BK), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new door lock control switch. REFER to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS . TEST the system for normal operation.
- No : REPAIR the circuit. TEST the system for normal operation.