Mike's Workshop Manuals: Service manuals for every vehicle
Home >> Chevrolet >> 2004 >> Optra Base, Standard >> Repair and Diagnosis >> Body & Frame >> Windows >> Door System, Mirror System & Window System >> Diagnostic Information and Procedures >> Power Windows Inoperative - All (Only Front Power Windows)

Power Windows Inoperative - All (Only Front Power Windows)

Step Action Values Yes No
CAUTION: When using an external power source to provide power to a component or circuit, always use a fused jumper wire with the proper amp rating for the component or circuit being tested. Failure to use a fused jumper wire may result in accidental overload and may cause personal injury or damage to the component or circuit.
1
  1. Turn ON the ignition, with the engine OFF.
  2. Attempt to operate both power windows.
Is either window working?		 - Go to Step 18  Go to Step 2 
2 Visually inspect the connection at the dual power window switch.
Is the electrical connector correctly attached to the switch?		 - Go to Step 4  Go to Step 3 
3 Correctly attach the electrical connector to the dual power window switch.
Is the repair complete?		 - System OK -
4
  1. Disconnect the electrical connector from the dual power window switch.
  2. Turn ON the ignition, with the engine OFF.
  3. Measure the voltage at terminal 4 and 5 of the power window main switch connector.
Is the voltage measured within the specified range?		 11-14 V Go to Step 16  Go to Step 5 
5 Inspect fuses EF14 and EF9.
Is either fuse open?		 - Go to Step 6  Go to Step 7 
6
  1. Inspect for a short circuit and repair, if necessary.
  2. Replace the open fuses.
Is the repair complete?		 - System OK -
7
  1. Turn ON the ignition, with the engine OFF.
  2. Inspect the voltages at fuses EF9 and EF14.
Are both voltages measured within the specified range?		 11-14 V Go to Step 9  Go to Step 8 
8 Repair the power supply to the fuse which did not indicate battery voltage with the ignition ON.
Is the repair complete?		 - System OK -
9
  1. Remove the power window relay.
  2. Turn ON the ignition, with the engine OFF.
  3. Measure the voltage at terminal 30 and terminal 85 of the power window relay socket. Terminals of the relay socket can be identified by the markings on the bottom of the relay.
Does the voltmeter indicate a value within the specified range at terminals 30 and 85?		 11-14 V Go to Step 11  Go to Step 10 
10 Repair the open circuit between the fuses and the power window relay.
Is the repair complete?		 - System OK -
11 With the power window relay still removed, use an ohmmeter to check the resistance between ground and terminal 86 of the power window relay socket.
Does the ohmmeter indicate the specified value?		 0 Ω Go to Step 13  Go to Step 12 
12 Repair the open circuit between ground and terminal 86 of the power window relay socket.
Is the repair complete?		 - System OK -
13
  1. Temporarily substitute a known good relay in place of the power window relay.
  2. Attempt to operate the power windows.
Do the power windows operate with the substituted relay?		 - Go to Step 14  Go to Step 15 
14
  1. Return the substituted relay to its original position.
  2. Replace the original power window relay.
Is the repair complete?		 - System OK -
15 Repair the open circuit between the power window relay socket terminal 87 and the dual power window switch terminal 4 and 5.
Is the repair complete?		 - System OK -
16 With the dual power window switch disconnected, use an ohmmeter to check the resistance between ground and terminal 7 of the dual power window switch connector.
Is the resistance equal to the specified value?		 0 Ω Go to Step 18  Go to Step 17 
17 Repair the open circuit between ground and terminal 7 of the dual power window switch connector.
Is the repair complete?		 - System OK -
18
  1. Remove the trim panel from a door which has an inoperative power window.
  2. Move a vehicle battery close enough to the door so that the window motor can be powered directly from the battery with jumper wires.
  3. Disconnect the 2-pin window motor connector in the door.
    4. IMPORTANT: To prevent the fuse in the jumper wire from blowing, do not touch the jumper wires together.
  4. Attach a jumper wire between the battery negative terminal and one of the terminals in the 2-pin window motor connector.
  5. Attach a fused jumper wire between the battery positive terminal and the remaining terminal in the 2-pin window motor connector. Unless the motor is at the end of its travel, the window should move with the jumpers attached.
  6. To move the window in the opposite direction, reverse the jumper wire connections at the window motor connector.
Does the power window operate in both directions when the motor is operated directly from a battery?		 - Go to Step 20  Go to Step 19 
19 Replace the window motor.
Is the repair complete?		 - System OK -
20
  1. Before reconnecting the 2-pin window motor connector, connect an ohmmeter between the terminals to check the resistance of the motor.
  2. Record the ohmmeter reading for motor resistance.
  3. Reconnect the motor connector and reinstall the door trim panel.
  4. Disconnect the electrical connector from the dual power window switch
  5. At the dual power window switch connector, use an ohmmeter to check the resistance between the terminals which lead to the motor that was tested in Step 16.
Is the resistance at the switch connector approximately equal to the resistance that was previously measured at the motor connector?		 - Go to Step 22  Go to Step 21 
21 Repair the open circuit between the window motor and the window switch.
Is the repair complete?		 - System OK -
22 Replace the power window switch.
Is the repair complete?		 - System OK -
scientia non olet · About Mike's Workshop Manuals