Pinpoint Test C: A Single Power Window is Inoperative - LH Front
Glass, Frames and Mechanisms
Pinpoint Tests
Pinpoint Test C: A Single Power Window is Inoperative - LH Front
Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number
Normal Operation
The LH front window control switch provides power and ground to the LH front window motor. Window direction is controlled by reversing polarity of the voltage and ground circuits being supplied to the window motor.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- LH front window control switch
- LH front window motor
PINPOINT TEST C: A SINGLE POWER WINDOW IS INOPERATIVE - LH FRONT
NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: If the LH front window is already in the full DOWN position, skip to pinpoint Step C2.
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C1 CHECK THE LH FRONT POWER WINDOW DOWN OPERATION
- Ignition OFF.
- Disconnect: LH Front Window Control Switch C504A (Crew Cab) or C535 (regular and SuperCab).
- Ignition ON.
- For regular or SuperCab, connect a fused jumper wire between LH front window control switch C535-7, circuit CBP01 (BU), harness side and LH window control switch C535-1, circuit CPW10 (YE/VT), harness side; and between LH front window control switch C535-5, circuit CPW11 (BU/GY), harness side and LH front window control switch C535-2, circuit GD137 (BK/WH), harness side.
- For Crew Cab, connect a fused jumper wire between LH front window control switch C504A-2, circuit CBP01 (BU), harness side and LH window control switch C504A-1, circuit CPW10 (YE/VT), harness side; and between LH front window control switch C504A-5, circuit CPW11 (BU/GY), harness side and ground.
- Does the LH front window move down?
Yes
REMOVE the jumper wires. GO to C2.
No
REMOVE the jumper wires. GO to C3.
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C2 CHECK THE LH FRONT POWER WINDOW UP OPERATION
- Ignition ON.
- For regular or SuperCab, connect a fused jumper wire between LH front window control switch C535-7, circuit CBP01 (BU), harness side and LH window control switch C535-5, circuit CPW11 (BU/GY), harness side; and between LH front window control switch C535-1, circuit CPW10 (YE/VT), harness side and LH front window control switch C535-2, circuit GD137 (BK/WH), harness side.
- For Crew Cab, connect a fused jumper wire between LH front window control switch C504A-2, circuit CBP01 (BU), harness side and LH window control switch C504A-5, circuit CPW11 (BU/GY), harness side; and between LH front window control switch C504A-1, circuit CPW10 (YE/VT), harness side and ground.
- Does the LH front window move up?
Yes
INSTALL a new LH front window control switch. REFER to Window Control Switch Service and Repair.
No
REMOVE the jumper wires. GO to C3.
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C3 CHECK WINDOW MOTOR CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: LH Front Window Motor C524.
- Measure the resistance between LH front window motor C524-2, circuit CPW10 (YE/VT), harness side and LH front window control switch C535-1 (regular and SuperCab) or C504A-1 (Crew Cab), circuit CPW10 (YE/VT), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to C4.
No
REPAIR the circuit. TEST the system for normal operation.
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C4 CHECK WINDOW MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between LH front window motor C524-1, circuit CPW11 (BU/GY), harness side and LH front window control switch C535-5 (regular and SuperCab) or C504A-5 (Crew Cab), circuit CPW11 (BU/GY), harness side.
- Is the resistance less than 5 ohms?
Yes
VERIFY there are no mechanical binding conditions preventing the glass mechanism from operating correctly. If a mechanical binding issue is found, REPAIR as necessary. If no mechanical binding condition exists, INSTALL a new LH front window motor. REFER to Window Regulator Motor - Front Door Window Regulator Motor - Front Door. TEST the system for normal operation.
No
REPAIR the circuit. TEST the system for normal operation.
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