Pinpoint Test B: All Power Windows Are Inoperative

WARNING: This page is about a different car, the 2006 Ford Pickup, 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 400 (LB/BK) FOR VOLTAGE
- Disconnect: LH Front Window Control Switch C504a.
- Key in ON position.
- Measure the voltage between LH front window control switch C504a-6, circuit 400 (LB/BK) harness side and ground.
  
  Fig 1: Checking Circuit 400 (LB/BK) For Voltage
- Is the voltage greater than 10 volts?
Yes : GO to B4.

No : GO to B2.
B2 CHECK CIRCUIT 400 (LB/BK) FOR A SHORT TO GROUND
- Key in OFF position.
- Disconnect: Accessory Delay Relay.
- Measure the resistance between LH front window control switch C504a-6, circuit 400 (LB/BK) harness side and ground.
  
  Fig 2: Checking Circuit 400 (LB/BK) For Short To Ground
- Is the resistance greater than 10,000 ohms?
Yes : GO to B3.

No : REPAIR the circuit. TEST the system for normal operation.
B3 CHECK CIRCUIT 400 (LB/BK) FOR AN OPEN
- Measure the resistance between LH front window control switch C504a-6, circuit 400 (LB/BK) harness side and accessory delay relay pin 87.
  
  Fig 3: Checking Circuit 400 (LB/BK) For Open
- Is the resistance less than 5 ohms?
Yes : GO to PINPOINT TEST F to diagnose the accessory delay relay system.

No : VERIFY CJB fuse 601 (30A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation.
B4 CHECK CIRCUIT 57 (BK) FOR AN OPEN
- Key in OFF position.
- Measure the resistance between LH front window control switch C504a-2, circuit 57 (BK) harness side and ground.
  
  Fig 4: Checking Circuit 57 (BK) For Open
- Is the resistance less than 5 ohms?
Yes : INSTALL a new LH front window control switch. REFER to WINDOW CONTROL SWITCH .

No : REPAIR the circuit. TEST the system for normal operation.