LEMON Manuals: Even more car manuals for everyone
Home >> Mercedes Benz >> 2025 >> eSprinter Base, _NA_ >> Repair and Diagnosis >> External Pages >> Different car >> Section 2386 (Windows & Glass - Glass, Frames & Mechanisms -- F250-F550 Super Duty) >> Diagnostic Tests >> Glass, Frames And Mechanisms >> Pinpoint Tests >> Pinpoint Test B: All Power Windows are Inoperative >> Pinpoint Test B: All Power Windows Are Inoperative

Pinpoint Test B: All Power Windows Are Inoperative

WARNING: This page is about a different car, the 2009 Ford Pickup, 2009 Ford F550 Super Duty, 2009 Ford F450 Super Duty, and 2009 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. B1 CHECK CIRCUIT CBP47 (GN/BU) FOR VOLTAGE 
    • Disconnect: LH Front Window Control Switch C504a (Crew Cab) or C504b (Regular and Super Cab)
    • Key in ON position.
    • Fig 1: Checking Circuit CBP47 (GN/BU) For Voltage
      GF0047992Courtesy of FORD MOTOR CO.
    • Measure the voltage between LH front window control switch C504a -2 (Crew Cab) or C504b-7 (regular and SuperCab), circuit CBP47 (GN/BU) harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  B3.
    2. NO  : VERIFY SJB circuit breaker 47 (30A) is OK. If OK, go to  B2.
  2. B2 CHECK CIRCUIT CBP47 (GN/BU) FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: Smart Junction Box (SJB) C2280D
    • Fig 2: Checking Circuit CBP47 (GN/BU) For An Open
      GF0047993Courtesy of FORD MOTOR CO.
    • Measure the resistance between LH front window control switch C504a -2 (Crew Cab) or C504b-7 (regular and SuperCab), circuit CBP47 (GN/BU) harness side and SJB C2280D-32, circuit CBP47 (GN/BU), harness side.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to Pinpoint Test F  to diagnose the delayed accessory relay system.
    2. NO  : REPAIR the circuit. TEST the system for normal operation.
  3. B3 CHECK CIRCUIT GD179 (BK/VT) FOR AN OPEN 
    • Key in OFF position.
    • Open the driver door.
    • Fig 3: Checking Circuit GD179 (BK/VT) For An Open
      GF0047994Courtesy of FORD MOTOR CO.
    • Measure the resistance between LH front window control switch C504b-7 (Crew Cab) or C504b-2 (regular and SuperCab), circuit GD179 (BK/VT) harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : INSTALL a new LH front window control switch. REFER to Window Control Switch .
    2. NO  : REPAIR the circuit. TEST the system for normal operation.