Pinpoint Test D: The LH Rear And RH Rear Power Windows Are Inoperative

NOTE: Use the correct probe adapter(s) from the Flex Probe Kit when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

D1 CHECK FOR VOLTAGE TO THE MASTER WINDOW CONTROL SWITCH
- Ignition OFF.
- Disconnect: Master Window Control Switch C504C.
- Ignition ON.
- Measure the voltage between master window control switch C504C-2, circuit CBP31 (BU/OG), harness side and ground.
  
  Fig 1: Measuring Voltage Between Master Window Control Switch C504C-2, Circuit CBP31 (BU/OG), Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the voltage greater than 10 volts?
- Yes : GO to D2.
- No : VERIFY Central Junction Box (CJB) fuse 31 (30A) is OK, If OK, REPAIR the circuit. CARRY OUT the window motor initialization procedure. REFER to Window Motor Initialization . TEST the system for normal operation.
  If not OK, REFER to the OEM WIRING DIAGRAMS article to identify the possible causes of the circuit short. REPAIR the circuit. CARRY OUT the window motor initialization procedure. REFER to Window Motor Initialization . TEST the system for normal operation.
D2 CHECK FOR AN OPEN CIRCUIT BETWEEN THE MASTER WINDOW CONTROL SWITCH AND THE REAR WINDOW CONTROL SWITCH
- Ignition OFF.
- Disconnect: LH Rear Window Control Switch C701.
- Measure the resistance between master window control switch C504C-1, circuit CPW01 (BN/BU), harness side and LH rear window control switch C701-2, circuit CPW01 (BN/BU), harness side.
  
  Fig 2: Measuring Resistance Between Master Window Control Switch C504C-1, Circuit CPW01 (BN/BU) And LH Rear Window Control Switch C701-2, Circuit CPW01 (BN/BU)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : INSTALL a new master window control switch. REFER to Window Control Switch . TEST the system for normal operation.
- No : REPAIR the circuit. CARRY OUT the window motor initialization procedure. REFER to Window Motor Initialization . TEST the system for normal operation.