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System with Only Front Power Windows, One or Both Windows Are Inoperative

CAUTION: When powering the window motors directly from a battery with jumper wires, make sure one of the jumper wires contains a fuse. If the jumpers are accidentally touched together, the fuse will prevent sparking and burns from sudden terminal heating.
SYSTEM WITH ONLY FRONT POWER WINDOWS, ONE OR BOTH WINDOWS INOPERATIVE - DIAGNOSIS PROCEDURE

Step Action Value (s) Yes No
1
  1. Turn the ignition ON.
  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 the ignition ON.
  3. Check the voltage at terminal 4 and 5 of the power window main switch connector.

Is the voltage equal to the specified value?		 11 - 14 V Go to Step 16 Go to Step 5
5 Check fuses Ef14 and Ef9.
Is either fuse blown?		 - Go to Step 6 Go to Step 7
6
  1. Check for a short circuit and repair if necessary.
  2. Replace the blown fuse(s).

Is the repair complete?		 - System OK -
7
  1. Turn the ignition ON.
  2. Check the voltages at fuses Ef9 and Ef14.

Are both voltages equal to the specified value?		 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 the ignition ON.
  3. Check 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 the specified value 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 two-pin window motor connector in the door.
    CAUTION: 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 two-pin window motor connector.
  5. Attach a fused jumper wire between the battery positive terminal and the remaining terminal in the two-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 two-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 15.

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 -
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