Pinpoint Test B: All Door Locks Are Inoperative

WARNING: This page is about a different car, the 2006 Ford F550 Super Duty, 2006 Ford F450 Super Duty, and 2006 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

B1 CHECK CIRCUIT 116 (RD/BK)
- Key in OFF position.
- Disconnect: Passenger Door Lock Control Switch C605.
- Measure the voltage between the passenger door lock control switch C605-4, circuit 116 (RD/BK), harness side and ground.
  
  Fig 1: Checking Circuit 116 (RD/BK)
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
Yes : GO to B2.

No : VERIFY the BJB fuse 102 (30A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
B2 CHECK CIRCUIT 117 (PK/BK) FOR AN OPEN
- Disconnect: Driver Door Lock Actuator C525.
- Measure the resistance between the passenger door lock control switch C605-7, circuit 117 (PK/BK), and the driver door lock actuator C525-1, circuit 117 (PK/BK).
  
  Fig 2: Checking Circuit 117 (PK/BK) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to B3.

No : REPAIR the circuit. TEST the system for normal operation.
B3 CHECK CIRCUIT 118 (PK/OG) FOR AN OPEN
- Measure the resistance between the passenger door lock control switch C605-3, circuit 118 (PK/OG), harness side and the driver door lock actuator C525-2, circuit 118 (PK/OG), harness side.
  
  Fig 3: Checking Circuit 118 (PK/OG) For Open
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : GO to B4.

No : REPAIR the circuit. TEST the system for normal operation.
B4 CHECK THE LOCK/UNLOCK CIRCUITS BETWEEN THE DOOR LOCK CONTROL SWITCHES
- Disconnect: Driver Door Lock Control Switch C505.
- 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.
  
  Fig 4: Checking Lock/Unlock Circuits Between Door Lock Control Switches (1 Of 2)
  Courtesy 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.
  
  Fig 5: Checking Lock/Unlock Circuits Between Door Lock Control Switches (2 Of 2)
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
Yes : INSTALL a new door lock control switch. REFER to DOOR LOCK CONTROL SWITCH . TEST the system for normal operation.

No : REPAIR the circuit(s) in question. TEST the system for normal operation.