Pinpoint Test D: A Single Power Window is Inoperative - LH Rear
Glass, Frames and Mechanisms
Pinpoint Tests
Pinpoint Test D: A Single Power Window is Inoperative - LH Rear
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number
Normal Operation
Under normal operation, the LH rear window control switch receives voltage from the LH front window control switch through circuit CPW14 (VT/WH) when the window lock switch is set to the UNLOCK position. The LH rear window control switch transfers voltage to the LH rear window motor through circuit CPW21 (BN) and ground through CPW22 (GN/VT) to operate the LH rear window downward. To move the LH rear window upward, the LH rear window control switch transfers voltage through circuit CPW22 (GN/VT) and ground through CPW21 (BN).
When operating the LH rear window from the LH front window control switch, voltage is sent to the LH rear window control switch through circuit CPW15 (YE) and ground through CPW16 (BU/OG) to operate the LH rear window downward. To move the LH rear window upward, the LH front window control switch provides voltage through circuit CPW16 (BU/OG) and ground through CPW15 (YE).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- LH front window control switch
- LH rear window control switch
- LH rear window motor
PINPOINT TEST D: A SINGLE POWER WINDOW IS INOPERATIVE - LH REAR
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 LH REAR WINDOW CONTROL SWITCH
- Disconnect: LH Rear Window Control Switch C701.
- Ignition ON.
- NOTE: Set the LH front window lock switch to the UNLOCK position.
- Measure the voltage between LH rear window control switch C701-2, circuit CPW14 (VT/WH), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to D3.
No
GO to D2.
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D2 CHECK CIRCUIT CPW14 (VT/WH) FOR AN OPEN
- Ignition OFF.
- Disconnect: LH Front Window Control Switch C535B.
- Measure the resistance between LH rear window control switch C701-2, circuit CPW14 (VT/WH), harness side and LH front window control switch C535B-1, circuit CPW14 (VT/WH), harness side.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new LH front window control switch. REFER to Window Control Switch - Front Window Control Switch - Front. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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D3 CHECK CIRCUITS CPW15 (YE) AND CPW16 (BU/OG) FOR CONTINUITY TO GROUND
- Ignition OFF.
- Measure the resistance between LH rear window control switch C701-1, circuit CPW16 (BU/OG), harness side and ground; and between LH rear window control switch C701-3, circuit CPW15 (YE), harness side and ground.
- Are the resistances less than 5 ohms?
Yes
GO to D5.
No
GO to D4.
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D4 CHECK CIRCUITS CPW15 (YE) AND CPW16 (BU/OG) FOR AN OPEN
- Disconnect: LH Front Window Control Switch C535B.
- Measure the resistance between LH front window control switch C535B, harness side and LH rear window control switch C701, harness side using the following chart:
- Are the resistances less than 5 ohms?
Yes
INSTALL a new LH front window control switch. REFER to Window Control Switch - Front Window Control Switch - Front. TEST the system for normal operation.
No
REPAIR the circuit(s). TEST the system for normal operation.
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D5 CHECK THE LH REAR WINDOW OPERATION
- Ignition ON.
- NOTE: Set the LH front window lock switch to the UNLOCK position.
- Connect a fused jumper wire between LH rear window control switch C701-2, circuit CPW14 (VT/WH), harness side and C701-6, circuit CPW21 (BN), harness side; and a second fused jumper wire between LH rear window control switch C701-4, circuit CPW22 (GN/VT), harness side and C701-1, circuit CPW16 (BU/OG), harness side. The LH rear window should operate in the downward direction.
- Connect a fused jumper wire between LH rear window control switch C701-2, circuit CPW14 (VT/WH), harness side and C701-4, circuit CPW22 (GN/VT), harness side; and a second fused jumper wire between LH rear window control switch C701-6, circuit CPW21 (BN), harness side and C701-3, circuit CPW15 (YE), harness side. The LH rear window should operate in the upward direction.
- Does the LH rear window operate correctly?
Yes
If the LH rear window did not operate with the LH rear window control switch, INSTALL a new LH rear window control switch. REFER to Window Control Switch - Rear Window Control Switch - Rear. TEST the system for normal operation.
If the LH rear window did operate with the LH rear window control switch, but not with the LH front window control switch, INSTALL a new LH front window control switch. REFER to Window Control Switch - Front Window Control Switch - Front. TEST the system for normal operation.
No
GO to D6.
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D6 CHECK CIRCUITS CPW22 (GN/VT) AND CPW21 (BN) FOR AN OPEN
- Ignition OFF.
- Disconnect: LH Rear Window Motor C726 (SuperCab) or C703 (SuperCrew).
- For SuperCab, measure the resistance between LH rear window control switch C701, harness side and LH rear window motor C726, harness side using the following chart:
- For SuperCrew, measure the resistance between LH rear window control switch C701, harness side and LH rear window motor C703, harness side using the following chart:
- Are the resistances less than 5 ohms?
Yes
INSTALL a new LH rear window motor. REFER to Window Regulator Motor Window Regulator Motor. TEST the system for normal operation.
No
REPAIR the circuit(s). TEST the system for normal operation.
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