Power Windows Inoperative - All. Buick LaCrosse 2005

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2005 🢒 LaCrosse 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Power Windows Inoperative - All

Test Description

The number below refers to the step number on the diagnostic table.

This step ensures that the power window master switch lockout signal circuit is not the cause of the malfunction. This circuit supplies battery positive voltage, through the rear window lockout switch, to the rear window switches, and is used to enable or disable the rear window lockout feature. When the rear window lockout feature is enabled, the circuit is open and no voltage is supplied to the rear window switches. When the feature is not enabled, the circuit is connected to battery positive voltage. If this circuit is shorted to ground when the lockout feature is not enabled, the PWR WDO circuit breaker may cycle continuously OFF/ON until, either the lockout switch is pressed to open the circuit, or the circuit breaker is permanently damaged. All windows may be partially or totally inoperative while the fault is present.

Step	Action	Yes	No
Schematic Reference: Power Window Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Are all the power windows inoperative?	Go to Step 3	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3	Disconnect the driver window switch C2 harness connector. Turn ON the ignition, with the engine OFF. Probe the power window switch voltage supply circuit of the harness connector with a test lamp that is connected to ground. Does the test lamp illuminate?	Go to Step 4	Go to Step 5
4	Connect the test lamp between the power window switch voltage supply circuit and the ground circuit of the harness connector. Does the test lamp illuminate?	Go to Step 6	Go to Step 8
5	Test for an open or a short to ground in the power window switch voltage supply circuits of the driver window and front passenger window switches. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 11	Go to Step 10
6	Test the power window master switch lockout signal circuit for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 11	Go to Step 7
7	Inspect for poor connections at the harness connector of the driver window switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 11	Go to Step 9
8	Repair the open in the ground circuit. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 11	--
9	Replace the driver window switch. Refer to Front Side Door Window Switch Replacement . Did you complete the replacement?	Go to Step 11	--
10	Replace the PWR WDO circuit breaker. Refer to Relay Replacement . Did you complete the repair?	Go to Step 11	--
11	Operate the system in order to verify the repair. Did you correct the condition?	System OK	Go to Step 2