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Diagnosis and Testing|Removal and Installation > < 501-11 Glass, Frames and Mechanisms|Specifications

Glass, Frames & Mechanisms: Diagnosis & Testing

Glass, Frames and Mechanisms - Glass, Frames and Mechanisms Fusion 2002.75 (06/2002-)
Diagnosis and Testing

Refer to Wiring Diagrams Section 501-11, for schematic and connector information.

Inspection and Verification

  1. Verify the customer concern.
  1. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical Electrical
  • Window seal
  • Door window frame
  • Fuse(s)
  • Electrical connector(s)
  • Switch(es)
  • Circuit(s)
  1. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
  1. If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom Possible Sources Action
All power windows are inoperative
*
Driver power window control switch.
*
CARRY OUT the Driver Power Window Control Switch Component Test. REFER to the Wiring Diagrams.
*
Circuit(s).
*
Vehicles with one-touch down window - GO to Pinpoint Test A.
*
Vehicles without one-touch down window - GO to Pinpoint Test B.
A single power window is inoperative - driver side
*
Driver power window control switch.
*
CARRY OUT the Driver Power Window Control Switch Component Test. REFER to the Wiring diagrams.
*
Power window motor.
*
Circuit(s).
*
Vehicles with one-touch down window - GO to Pinpoint Test C.
*
Vehicles without one-touch down window - GO to Pinpoint Test D.
A single power window is inoperative - passenger side
*
Driver power window control switch.
*
CARRY OUT the Driver Power Window Control Switch Component Test. REFER to the Wiring diagrams.
*
Passenger power window control switch.
*
CARRY OUT the Passenger Power Window Control Switch Component Test. REFER to the Wiring Diagrams.
*
Power window motor.
*
Circuit(s).
*
GO to Pinpoint Test E.
The one-touch down window is inoperative
*
Driver power window control switch.
*
CARRY OUT the Driver Power Window Control Switch Component Test. REFER to the Wiring Diagrams.
The defrost system is inoperative
*
Heated rear window control switch.
*
CARRY OUT the Heated Rear Window Control Switch Component Test. REFER to the Wiring diagrams.
*
Heated windshield control switch.
*
CARRY OUT the Heated Windshield Control Switch Component Test. REFER to the Wiring Diagrams.
*
Heated windshield relay.
*
CARRY OUT the Heated Windshield Relay Component Test. REFER to the Wiring diagrams.
*
Generic electronic module (GEM).
*
CARRY OUT the Generic Electronic Module Self-Test. REFER to: (419-10 Multifunction Electronic Modules)
Generic Electronic Module (GEM) - Vehicles Built Up To: 10/2005 (Diagnosis and Testing),
Generic Electronic Module (GEM) - Vehicles Built From: 10/2005 (Diagnosis and Testing).
*
Heated rear window grid wire.
*
CARRY OUT the Heated Rear Window Grid Wire Component Test in this procedure.
*
Heated windshield grid wire.
*
Circuit(s).
*
GO to Pinpoint Test F.
The defrost system will not shut off automatically
*
Heated rear window control switch.
*
CARRY OUT the Heated Rear Window Control Switch Component Test. REFER to the Wiring Diagrams.
*
Heated windshield control switch.
*
CARRY OUT the Heated Windshield Control Switch Component Test. REFER to the Wiring Diagrams.
*
Heated windshield relay.
*
CARRY OUT the Heated Windshield Relay Component Test. REFER to the Wiring Diagrams.
*
Generic electronic module (GEM).
*
CARRY OUT the Generic Electronic Module Self-Test. REFER to: (419-10 Multifunction Electronic Modules)
Generic Electronic Module (GEM) - Vehicles Built Up To: 10/2005 (Diagnosis and Testing),
Generic Electronic Module (GEM) - Vehicles Built From: 10/2005 (Diagnosis and Testing).

PINPOINT TEST A : ALL POWER WINDOWS ARE INOPERATIVE - VEHICLES WITH ONE-TOUCH DOWN WINDOW
NOTE:
NOTE:Use a digital multimeter for all electrical measurements.
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
A1: CHECK THE DRIVER POWER WINDOW CONTROL SWITCH LEDS
1
Ignition switch in position II.

Do the driver power window control switch LEDs illuminate?
Yes
VERIFY the customer concern.
No
GO to A2.
A2: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND GROUND
1
Ignition switch in position 0.
2
Disconnect Driver Window Control Switch C309.

3
Measure the resistance between the driver power window control switch C309 pin 5, circuit 31-AJ7 (BK), harness side and ground.

Is the resistance less than 5 ohms?
Yes
GO to A3.
No
REPAIR circuit 31-AJ7 (BK). TEST the system for normal operation.
A3: CHECK FOR VOLTAGE TO THE DRIVER POWER WINDOW CONTROL SWITCH
1
Ignition switch in position II.

2
Measure the voltage between the driver power window control switch C309 pin 6, circuit 15-AJ2 (GN/BU), harness side and ground.

Is the voltage greater than 10 volts?
Yes
VERIFY the customer concern.
No
REPAIR circuit 15-AJ2 (GN/BU). TEST the system for normal operation.

PINPOINT TEST B : ALL POWER WINDOWS ARE INOPERATIVE - VEHICLES WITHOUT ONE-TOUCH DOWN WINDOW
NOTE:
NOTE:Use a digital multimeter for all electrical measurements.
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
B1: CHECK THE DRIVER POWER WINDOW CONTROL SWITCH LEDS
1
Ignition switch in position II.

Do the driver power window control switch LEDs illuminate?
Yes
VERIFY the customer concern.
No
GO to B2.
B2: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND GROUND
1
Ignition switch in position 0.
2
Disconnect Driver Window Control Switch C310.

3
Measure the resistance between the driver power window control switch C310 pin 3, circuit 31-AJ7 (BK), harness side and ground.

Is the resistance less than 5 ohms?
Yes
GO to B3.
No
REPAIR circuit 31-AJ7 (BK). TEST the system for normal operation.
B3: CHECK FOR VOLTAGE TO THE DRIVER POWER WINDOW CONTROL SWITCH
1
Ignition switch in position II.

2
Measure the voltage between the driver power window control switch C310 pin 2, circuit 15-AJ7 (GN/BU), harness side and ground.

Is the voltage greater than 10 volts?
Yes
VERIFY the customer concern.
No
REPAIR circuit 15-AJ7 (GN/BU). TEST the system for normal operation.

PINPOINT TEST C : A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER SIDE - VEHICLES WITH ONE-TOUCH DOWN WINDOW
NOTE:
NOTE:Use a digital multimeter for all electrical measurements.
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
C1: CHECK FOR VOLTAGE TO THE DRIVER POWER WINDOW CONTROL SWITCH
1
Ignition switch in position II.

Does the driver power window control switch LED illuminate?
Yes
GO to C2.
No
GO to C4.
C2: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND THE MOTOR DOWN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Driver Power Window Control Switch C309.
3
Disconnect Driver Power Window Motor C529.

4
Measure the resistance between the driver power window control switch C309 pin 2, circuit 32-AJ26 (WH), harness side and the driver power window motor C529 pin 2, circuit 32-AJ26 (WH), harness side.

Is the resistance less than 5 ohms?
Yes
GO to C3.
No
REPAIR circuit 32-AJ26 (WH). TEST the system for normal operation.
C3: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND THE MOTOR UP CIRCUIT

1
Measure the resistance between the driver power window control switch C309 pin 4, circuit 33-AJ26 (YE), harness side and the driver power window motor C529 pin 1, circuit 33-AJ26 (YE), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new front door window regulator motor.
REFER to: Front Door Window Regulator Motor (501-11 Glass, Frames and Mechanisms, Removal and Installation).
TEST the system for normal operation.
No
REPAIR circuit 33-AJ26 (YE). TEST the system for normal operation.
C4: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND GROUND
1
Ignition switch in position 0.
2
Disconnect Driver Power Window Control Switch C309.

3
Measure the resistance between the driver power window control switch C309 pin 5, circuit 31-AJ7 (BK), harness side and ground.

Is the resistance less than 5 ohms?
Yes
GO to C5.
No
REPAIR circuit 31-AJ7 (BK). TEST the system for normal operation.
C5: CHECK FOR VOLTAGE TO THE DRIVER POWER WINDOW CONTROL SWITCH
1
Ignition switch in position II.

2
Measure the voltage between the driver power window control switch C310 pin 6, circuit 15-AJ2 (GN/BU), harness side and ground.

Is the voltage greater than 10 volts?
Yes
VERIFY the customer concern.
No
REPAIR circuit 15-AJ2 (GN/BU). TEST the system for normal operation.

PINPOINT TEST D : A SINGLE POWER WINDOW IS INOPERATIVE - DRIVER SIDE - VEHICLES WITHOUT ONE-TOUCH DOWN WINDOW
NOTE:
NOTE:Use a digital multimeter for all electrical measurements.
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
D1: CHECK FOR VOLTAGE TO THE DRIVER POWER WINDOW CONTROL SWITCH
1
Ignition switch in position II.

Does the driver power window control switch LED illuminate?
Yes
GO to D2.
No
GO to D4.
D2: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND THE MOTOR DOWN CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Driver Power Window Control Switch C310.
3
Disconnect Driver Power Window Motor C529.

4
Measure the resistance between the driver power window control switch C310 pin 1, circuit 32-AJ26 (WH), harness side and the driver power window motor C529 pin 2, circuit 32-AJ26 (WH), harness side.

Is the resistance less than 5 ohms?
Yes
GO to D3.
No
REPAIR circuit 32-AJ26 (WH). TEST the system for normal operation.
D3: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND THE MOTOR UP CIRCUIT

1
Measure the resistance between the driver power window control switch C310 pin 7, circuit 33-AJ26 (YE), harness side and the driver power window motor C529 pin 1, circuit 33-AJ26 (YE), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new front door window regulator motor.
REFER to: Front Door Window Regulator Motor (501-11 Glass, Frames and Mechanisms, Removal and Installation).
TEST the system for normal operation.
No
REPAIR circuit 33-AJ26 (YE). TEST the system for normal operation.
D4: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND GROUND
1
Ignition switch in position 0.
2
Disconnect Driver Power Window Control Switch C310.

3
Measure the resistance between the driver power window control switch C310 pin 3, circuit 31-AJ7 (BK), harness side and ground.

Is the resistance less than 5 ohms?
Yes
GO to D5.
No
REPAIR circuit 31-AJ7 (BK). TEST the system for normal operation.
D5: CHECK FOR VOLTAGE TO THE DRIVER POWER WINDOW CONTROL SWITCH
1
Ignition switch in position II.

2
Measure the voltage between the driver power window control switch C310 pin 2, circuit 15-AJ7 (GN/BU), harness side and ground.

Is the voltage greater than 10 volts?
Yes
VERIFY the customer concern.
No
REPAIR circuit 15-AJ7 (GN/BU). TEST the system for normal operation.

PINPOINT TEST E : A SINGLE POWER WINDOW IS INOPERATIVE - PASSENGER SIDE
NOTE:
NOTE:Use a digital multimeter for all electrical measurements.
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
E1: DOES THE PASSENGER WINDOW OPERATE FROM THE DRIVER SIDE POWER WINDOW CONTROL SWITCH
1
Ignition switch in position II.
2
Operate the passenger power window from the driver power window control switch.

Does the passenger power window operate?
Yes
REPAIR circuit 15-AJ18 (GN/WH). TEST the system for normal operation.
No
GO to E2.
E2: CHECK THE DRIVER SIDE PASSENGER POWER WINDOW CONTROL SWITCH LED
1
Observe the driver side passenger power window control switch LED.

Is the driver side passenger power window control switch LED illuminated?
Yes
GO to E3.
No
GO to E7.
E3: CHECK THE DOWN CIRCUIT VOLTAGE TO THE PASSENGER POWER WINDOW CONTROL SWITCH
1
Ignition switch in position 0.
2
Disconnect Passenger Power Window Control Switch C699.
3
Ignition switch in position II.
4
Operate the driver side passenger power window control switch to the DOWN position.

5
Measure the voltage between the passenger power window control switch C699 pin 3, circuit 33-AJ18 (YE/VT), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to E4.
No
REPAIR circuit 33-AJ18 (YE/VT). TEST the system for normal operation.
E4: CHECK THE UP CIRCUIT VOLTAGE TO THE PASSENGER POWER WINDOW CONTROL SWITCH
1
Operate the driver side passenger power window control switch to the UP position.

2
Measure the voltage between the passenger power window control switch C699 pin 6, circuit 32-AJ18 (WH/VT), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to E5.
No
REPAIR circuit 32-AJ18 (WH/VT). TEST the system for normal operation.
E5: CHECK FOR CONTINUITY BETWEEN THE PASSENGER POWER WINDOW CONTROL SWITCH DOWN CIRCUIT AND THE PASSENGER POWER WINDOW MOTOR
1
Ignition switch in position 0.
2
Disconnect Power Window Motor C530.

3
Measure the resistance between the passenger power window control switch C699 pin 7, circuit 33-AJ27 (YE/VT), harness side and the passenger power window motor C530 pin 1, circuit 33-AJ27 (YE/VT), harness side.

Is the resistance less than 5 ohms?
Yes
GO to E6.
No
REPAIR circuit 33-AJ27 (YE/VT). TEST the system for normal operation.
E6: CHECK FOR CONTINUITY BETWEEN THE PASSENGER POWER WINDOW CONTROL SWITCH UP CIRCUIT AND THE PASSENGER POWER WINDOW MOTOR

1
Measure the resistance between the passenger power window control switch C699 pin 1, circuit 32-AJ27 (WH/VT), harness side and the passenger power window motor C530 pin 2, circuit 32-AJ27 (WH/VT), harness side.

Is the resistance less than 5 ohms?
Yes
INSTALL a new front door window regulator motor.
REFER to: Front Door Window Regulator Motor (501-11 Glass, Frames and Mechanisms, Removal and Installation).
TEST the system for normal operation.
No
REPAIR circuit 32-AJ27 (WH/VT). TEST the system for normal operation.
E7: CHECK FOR CONTINUITY BETWEEN THE DRIVER POWER WINDOW CONTROL SWITCH AND GROUND
1
Ignition switch in position 0.
2
Disconnect Driver Side Passenger Power Window Control Switch C311.

3
Measure the resistance between the driver power window control switch C311 pin 3, circuit 31-AJ9 (BK), harness side and ground.

Is the resistance less than 5 ohms?
Yes
GO to E8.
No
REPAIR circuit 31-AJ9 (BK). TEST the system for normal operation.
E8: CHECK FOR VOLTAGE TO THE DRIVER POWER WINDOW CONTROL SWITCH
1
Ignition switch in position II.

2
Measure the voltage between the driver power window control switch C311 pin 2, circuit 15-AJ9 (GN/BK), harness side and ground.

Is the voltage greater than 10 volts?
Yes
VERIFY the customer concern.
No
REPAIR circuit 15-AJ9 (GN/BK). TEST the system for normal operation.

PINPOINT TEST F : THE DEFROST SYSTEM IS INOPERATIVE
NOTE:
NOTE:Use a digital multimeter for all electrical measurements.
TEST CONDITIONS DETAILS/RESULTS/ACTIONS
F1: CHECK THE OPERATION OF THE HEATED REAR WINDOW
1
Ignition switch in position II.
2
Operate the heated rear window control switch.

Does the heated rear window function correctly?
Yes
GO to F2.
No
GO to F3.
F2: CHECK THE OPERATION OF THE HEATED WINDSHIELD
1
Operate the heated windshield control switch.

Does the heated windshield operate correctly?
Yes
VERIFY the customer concern.
No
GO to F5.
F3: CHECK THE OPERATION OF THE HEATED EXTERIOR MIRRORS
1
Operate the heated rear window control switch.

Do the heated exterior mirrors operate correctly?
Yes
GO to F4.
No
GO to F10.
F4: CHECK THE HEATED REAR WINDOW GRID GROUND CIRCUIT
1
Ignition switch in position 0.
2
Disconnect Heated Rear Window C561A.

3
Measure the resistance between the heated rear window C561A pin 1, circuit 31-HB19 (BK), harness side and ground.

Is the resistance less than 5 ohms?
Yes
REPAIR circuit 15S-HB19 (GN/BU). TEST the system for normal operation.
No
REPAIR circuit 31-HB19 (BK). TEST the system for normal operation.
F5: CHECK OPERATION OF THE HEATED WINDSHIELD RELAY
1
Ignition switch in position III.
2
Ignition switch in position II.
3
Operate the heated windshield control switch.

Does the heated windshield relay click?
Yes
GO to F6.
No
GO to F12.
F6: CHECK FOR VOLTAGE TO THE HEATED WINDSHIELD RELAY
1
Ignition switch in position 0.
2
Disconnect Heated Windshield Relay C312.

3
Measure the voltage between the heated windshield relay C312 pin 3, circuit 30-HB8 (RD), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to F7.
No
REPAIR circuit 30-HB8 (RD). TEST the system for normal operation.
F7: CHECK FOR VOLTAGE TO THE HEATED WINDSHIELD GRID WIRES
1
Connect Heated Windshield Relay C312.
2
Disconnect Heated Windshield Grid Wires C335 and C350.
3
Ignition switch in position III.
4
Ignition switch in position II.
5
Operate the heated windshield control switch.

6
Measure the voltage between the:
  • heated windshield left-hand grid wire C335 pin 1, circuit 20S-HB12 (PK/YE), harness side and ground.
  • heated windshield right-hand grid wire C350 pin 1, circuit 20S-HB25 (PK/BU), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to F8.
No
REPAIR circuit 20S-HB12 (PK/YE) or circuit 20S-HB25 (PK/BU). TEST the system for normal operation.
F8: CHECK THE HEATED WINDSHIELD GRID WIRE GROUND CIRCUITS
1
Ignition switch in position 0.
2
Measure the resistance between the heated windshield ground circuits and ground.

Are the resistances less than 5 ohms?
Yes
GO to F9.
No
REPAIR the heated windshield ground circuit. TEST the system for normal operation.
F9: CHECK THE HEATED WINDSHIELD GRID WIRES

1
Measure the resistance between the:
  • heated windshield left-hand grid wire C335 pin 1, circuit 20S-HB12 (PK/YE), harness side and ground.
  • heated windshield right-hand grid wire C350 pin 1, circuit 20S-HB25 (PK/BU), harness side and ground.

Are the resistances greater than 10,000 ohms?
Yes
INSTALL a new windshield glass.
REFER to: Windshield Glass (501-11 Glass, Frames and Mechanisms, Removal and Installation).
TEST the system for normal operation.
No
VERIFY the customer concern.
F10: CHECK FOR VOLTAGE TO THE HEATED REAR WINDOW CONTROL SWITCH
1
Operate the heated rear window control switch.

Does the heated rear window control switch ON LED illuminate?
Yes
GO to F11.
No
GO to F15.
F11: CHECK FOR VOLTAGE TO THE CENTRAL JUNCTION BOX (CJB) FUSE 32 (7.5A) INPUT SIDE
1
Ignition switch in position 0.
2
Disconnect Fuse 32 (7.5A).
3
Ignition switch in position II.
4
Operate the heated rear window control switch.
5
Measure the voltage between the CJB fuse 32 (7.5A), input side and ground.

Is the voltage greater than 10 volts?
Yes
VERIFY the customer concern.
No
REPAIR circuit 15S-HB16 (GN/OG). TEST the system for normal operation.
F12: CHECK FOR VOLTAGE TO THE HEATED WINDSHIELD CONTROL SWITCH
1
Operate the heated windshield control switch.

Does the heated windshield control switch ON LED illuminate?
Yes
GO to F13.
No
GO to F17.
F13: CHECK FOR VOLTAGE TO THE HEATED WINDSHIELD RELAY
1
Ignition switch in position 0.
2
Disconnect Heated Windshield Relay C312.
3
Ignition switch in position II.
4
Operate the heated windshield control switch.

5
Measure the voltage between the heated windshield relay C312 pin 1 circuit 15S-HB7 (GN/BU), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to F14.
No
REPAIR circuit 15S-HB7 (GN/BU). TEST the system for normal operation.
F14: CHECK FOR CONTINUITY BETWEEN THE HEATED WINDSHIELD RELAY AND THE GENERIC ELECTRONIC MODULE (GEM)
1
Ignition switch in position 0.
2
Disconnect GEM C319.

3
Measure the resistance between the heated windshield relay C312 pin 2, circuit 31S-HB7 (BK/BU), harness side and the GEM C319 pin 12, circuit 31S-HB7 (BK/BU), harness side.

Is the resistance less than 5 ohms?
Yes
VERIFY the customer concern.
No
REPAIR circuit 31S-HB7 (BK/BU). TEST the system for normal operation.
F15: CHECK FOR CONTINUITY BETWEEN THE GENERIC ELECTRONIC MODULE (GEM) AND GROUND
1
Ignition switch in position 0.
2
Disconnect GEM C320.
3
Operate the heated rear window control switch.

4
Measure the resistance between the GEM C320 pin 11, circuit 31S-HB22 (BK/GN), harness side and ground.

Is the resistance less than 5 ohms?
Yes
GO to F16.
No
REPAIR circuit 31S-HB22 (BK/GN). TEST the system for normal operation.
F16: CHECK FOR CONTINUITY BETWEEN THE GEM AND THE HEATED REAR WINDOW CONTROL SWITCH

1
Measure the resistance between the GEM C320 pin 12, circuit 31S-HB31 (BK/OG), harness side and the heated rear window control switch C714 pin 4, circuit 31S-HB31 (BK/OG), harness side.

Is the resistance less than 5 ohms?
Yes
VERIFY the customer concern.
No
Repair circuit 31S-HB21 (BK/OG). TEST the system for normal operation.
F17: CHECK FOR VOLTAGE TO THE HEATED WINDSHIELD CONTROL SWITCH
1
Ignition switch in position 0.
2
Disconnect Heated Windshield Control Switch C714.
3
Ignition switch in position II.

4
Measure the voltage between the heated windshield control switch C714 pin 11, circuit 31S-HB9 (BK/WH), harness side and ground.

Is the voltage greater than 10 volts?
Yes
GO to F18.
No
Repair circuit 31S-HB9 (BK/WH). TEST the system for normal operation.
F18: CHECK FOR CONTINUITY BETWEEN THE GENERIC ELECTRONIC MODULE (GEM) AND THE HEATED WINDSHIELD CONTROL SWITCH
1
Disconnect GEM C320.

2
Measure the resistance between the heated windshield control switch C714 pin 8, circuit 31S-HB6 (BK/YE), harness side and the GEM C320 pin 9, circuit 31S-HB6 (BK/YE), harness side.

Is the resistance less than 5 ohms?
Yes
VERIFY the customer concern.
No
REPAIR circuit 31S-HB22 (BK/GN). TEST the system for normal operation.

Component Tests

Heated Rear Window Grid Wire Test

  1. Using a bright lamp inside the vehicle, visually inspect the grid wire from the outside. A broken grid conductor line will appear as a brown spot.
  1. Run the engine at idle. Set the heated rear window control switch and lights to ON. The heated rear window indicator light should illuminate.
  1. Working inside the vehicle with a multimeter, contact the broad red/brown strips on the heated rear window positive lead to battery side and negative lead to ground side. The meter should read 10-13 volts. A lower voltage reading indicates a loose heated rear window ground wire connection at the heated rear window ground wire screw.
  1. Contact a ground point with the negative lead of the multimeter. The voltage reading should not change.
  1. With the negative lead of the multimeter grounded, touch each grid line of the heated rear window at its pinpoint with the positive lead. A reading of approximately six volts indicates that the line is OK. A reading of zero volts indicates that the line is broken between the midpoint and the battery side of the grid line. A reading of 12 volts indicates that the circuit is broken between the midpoint of the grid line and ground.
  1. INSTALL a new heated rear window glass.
    REFER to: Liftgate Window Glass (501-11 Glass, Frames and Mechanisms, Removal and Installation).

Diagnosis and Testing|Removal and Installation > < 501-11 Glass, Frames and Mechanisms|Specifications