Pinpoint Test D: A Single Power Window Is Inoperative - LR Or RR
Glass, Frames and Mechanisms
Pinpoint Tests
Pinpoint Test D: A Single Power Window is Inoperative - LR or RR, Expedition
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number
Normal Operation
Under normal operation, the LR and RR window control switches receive power from the master window control switch through circuit CPW30 (GY/YE). The LR window control switch provides power to the LR power window motor through circuit CPW21 (BN) and ground through circuit CPW22 (GN/VT) to operate the LR window down and power through circuit CPW22 (GN/VT) and ground through circuit CPW21 (BN) to operate the LR window up. The RR window control switch provides power to the RR power window motor through circuit CPW23 (GY) and ground through circuit CPW24 (WH/VT) to operate the RR window down and power through circuit CPW24 (WH/VT) and ground through circuit CPW23 (GY) to operate the RR window up.
When operating the LR window using the master window control switch, power is sent to the LR window control switch through circuit CPW15 (YE) and ground through circuit CPW16 (BU/OG) to operate the LR window down and power through circuit CPW16 (BU/OG) and ground through circuit CPW15 (YE) to operate the LR window up. When operating the RR window using the master window control switch, power is sent to the RR window control switch through circuit CPW17 (BN/GN) and ground through circuit CPW18 (GY/VT) to operate the RR window down and power through circuit CPW18 (GY/VT) and ground through circuit CPW17 (BN/GN) to operate the RR window up.
This pinpoint test is intended to diagnose the following:
- Window control switch
- Wiring, terminals or connectors
- Rear door window regulator motor
PINPOINT TEST D: A SINGLE POWER WINDOW IS INOPERATIVE - LR OR RR, EXPEDITION
NOTICE: 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.
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D1 CHECK THE VOLTAGE TO THE LR OR RR WINDOW CONTROL SWITCH
- Disconnect: Inoperative Rear Window Control Switch C701 (LR) or C801 (RR).
- Ignition ON.
- NOTE: Set the window lock switch to the UNLOCK position.
- Measure the voltage between the inoperative rear window switch C701-3 or C801-3, circuit CPW30 (GY/YE), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to D2.
No
REPAIR circuit CPW30 (GY/YE) for an open. TEST the system for normal operation.
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D2 CHECK THE GROUNDS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH
- Ignition OFF.
- Measure the resistance between the inoperative rear window switch connector and ground.
- For an inoperative LR window, measure the resistance between LR window switch C701-1, circuit CPW17 (BN/GN), harness side and ground; and between C701-6, circuit CPW18 (GY/VT), harness side and ground.
- For an inoperative RR window, measure the resistance between RR window switch C801-1, circuit CPW17 (BN/GN), harness side and ground; and between C801-6, circuit CPW18 (GY/VT), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
GO to D4.
No
GO to D3.
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D3 CHECK THE CIRCUITS TO THE INOPERATIVE REAR WINDOW CONTROL SWITCH FOR AN OPEN
- Ignition OFF.
- Disconnect: Master Window Control Switch C504B.
- For an inoperative LR window, measure the resistance between master window control switch C504B, harness side and LR window control switch C701, harness side using the following chart:
- For an inoperative RR window, measure the resistance between master window control switch C504B, harness side and RR window control switch C801, harness side using the following chart:
- Is the resistance less than 5 ohms?
Yes
INSTALL a new master window control switch. REFER to Window Control Switch Service and Repair. TEST the system for normal operation.
No
REPAIR circuit CPW15 (YE), CPW16 (BU/OG), CPW17 (BN/GN) or CPW18 (GY/VT) for an open. TEST the system for normal operation.
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D4 CHECK THE INOPERATIVE WINDOW CONTROL SWITCH
- Connect: Master Window Control Switch C504B.
- Ignition ON.
- Connect fused jumper wires between the inoperative power window switch as shown.
- For an inoperative LR window, connect a fused jumper wire between LR window control switch C701-5, circuit CPW24 (WH/VT), harness side and C701-3, circuit CPW30 (YE), harness side; and a second fused jumper wire between C701-2, circuit CPW23 (GY), harness side and C701-1, circuit CPW17 (BN/GN), harness side. The window should operate in the upward direction.
- For an inoperative RR window, connect a fused jumper wire between RR window control switch C801-5, circuit CPW24 (WH/VT), harness side and C801-3, circuit CPW30 (YE), harness side; and a second fused jumper wire between C801-2, circuit CPW23 (GY), harness side and C801-1, circuit CPW17 (BN/GN), harness side. The window should operate in the upward direction.
- Connect fused jumper wires between the inoperative power window switch as shown.
- For an inoperative LR window, connect a fused jumper wire between LR window control switch C701-5, circuit CPW24 (WH/VT), harness side and C701-6, circuit CPW18 (GY/VT), harness side; and a second fused jumper wire between C701-2, circuit CPW23 (GY), harness side and C701-3, circuit CPW30 (GY/YE), harness side. The window should operate in the downward direction.
- For an inoperative RR window, connect a fused jumper wire between RR window control switch C801-5, circuit CPW24 (WH/VT), harness side and C801-6, circuit CPW18 (GY/VT), harness side; and a second fused jumper wire between C801-2, circuit CPW23 (GY), harness side and C801-3, circuit CPW30 (GY/YE), harness side. The window should operate in the downward direction.
- Does the window operate correctly?
Yes
INSTALL a new rear window control switch. REFER to Window Control Switch Service and Repair. TEST the system for normal operation.
No
GO to D5.
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D5 CHECK POWER WINDOW MOTOR CIRCUITS
- Ignition OFF.
- Disconnect: Inoperative Power Window Motor C703 (LR) or C803 (RR).
- Measure the resistance between inoperative window control switch and the inoperative window motor.
- For an inoperative LR window, measure the resistance between LR window control switch C701-5, circuit CPW24 (WH/VT), harness side and LR power window motor C703-2, circuit CPW24 (WH/VT), harness side.
- For an inoperative RR window, measure the resistance between RR window control switch C801-5, circuit CPW24 (WH/VT), harness side and RR power window motor C803-2, circuit CPW24 (WH/VT), harness side.
- Measure the resistance between inoperative window control switch and the inoperative window motor.
- For an inoperative LR window, measure the resistance between LR window control switch C701-2, circuit CPW23 (GY), harness side and LR power window motor C703-1, circuit CPW23 (GY), harness side.
- For an inoperative RR window, measure the resistance between RR window control switch C801-2, circuit CPW23 (GY), harness side and RR power window motor C803-1, circuit CPW23 (GY), harness side.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new rear window regulator motor. REFER to Window Regulator Motor - Rear Door Window Regulator Motor - Rear Door. TEST the system for normal operation.
No
REPAIR the circuit(s) for an open. TEST the system for normal operation.
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