Pinpoint Test B: All Power Windows are Inoperative

Glass, Frames and Mechanisms

Pinpoint Tests

Pinpoint Test B: All Power Windows are Inoperative

Refer to Wiring Diagram Set 100, Power Windows for schematic and connector information. Diagrams By Number

Normal Operation

Under normal operation, power is sent to the LH front window control switch through circuit CBP47 (GN/BU) from the accessory delay relay. The LH front window control switch is grounded through circuit GD179 (BK/VT).

This pinpoint test is intended to diagnose the following:
- Circuit breaker
- Accessory delay relay
- Wiring, terminals or connectors
- LH front window control switch
- Smart Junction Box (SJB)



PINPOINT TEST B: ALL POWER WINDOWS ARE INOPERATIVE

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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B1 CHECK CIRCUIT CBP47 (GN/BU) FOR VOLTAGE


- Disconnect: LH Front Window Control Switch C504A (Crew Cab) or C535B (regular and SuperCab).
- Ignition ON.
- Measure the voltage between LH front window control switch C504A-2 (Crew Cab) or C535-7 (regular and SuperCab), circuit CBP47 (GN/BU), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to B3.

No
VERIFY SJB circuit breaker 47 (30A) is OK. If OK, GO to B2.

If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short. Diagrams By Number

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B2 CHECK CIRCUIT CBP47 (GN/BU) FOR AN OPEN


- Ignition OFF.
- Disconnect: SJB C2280D.
- Measure the resistance between LH front window control switch C504A-2 (Crew Cab) or C535-7 (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?

Yes
GO to Pinpoint Test F to DIAGNOSE the accessory delay relay system. Pinpoint Test F: The Delayed Accessory is Inoperative

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

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B3 CHECK CIRCUIT GD179 (BK/VT) FOR AN OPEN


- Ignition OFF.
- Open the driver door.
- Measure the resistance between LH front window control switch C504B-7 (Crew Cab) or C535-2 (regular and SuperCab), circuit GD179 (BK/VT), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new LH front window control switch. REFER to Window Control Switch Service and Repair.

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

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