Ford Workshop Service and Repair Manuals > Cougar 1999 (08.1998-01.2001) > Mechanical Repairs | 5 Body and Paint | 501 Body and Paint | 501-11 Glass, Frames and Mechanisms | Description and Operation | Diagnosis and Testing | Glass, Frames and Mechanisms

Glass, Frames and Mechanisms - Vehicles Built From: 05-1999 > < Glass, Frames and Mechanisms

Glass, Frames and Mechanisms - Glass, Frames and Mechanisms—Vehicles Built Up To: 05/1999

Cougar 1999 (08/1998-01/2001)

Diagnosis and Testing

General Equipment

Multimeter

Refer to the Wiring Diagram, Section 501-11, Glass, Frames and Mechanisms for schematic and connector information.

Inspection and Verification

Verify the customer concern by operating the system.

Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection Chart

Mechanical	Electrical
Window glass. Window regulator.	Fuse. Window motor. Loose or corroded connector(s). Switch. Circuit.

If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.

If the concern is not visually evident, verify the symptom and refer to the Symptom Chart.

Symptom Chart

Symptom	Possible Sources	Action
All power windows are inoperative	* Fuse. * Circuit(s). * Driver power window switch.	* GO to Pinpoint Test A.
Single power window inoperative - left front	* One touch down relay. * Circuit(s). * Driver power window switch. * Driver power window motor.	* GO to Pinpoint Test B.
Single power window inoperative - right front	* Circuit(s). * Driver power window switch. * Passenger power window switch. * Passenger power window motor.	* GO to Pinpoint Test C.
The one touch down feature is inoperative	* Circuit(s). * Driver power window switch. * One touch down relay.	* GO to Pinpoint Test D.
The back window will not defrost	* Circuit. * Back window defroster switch. * Back window defroster. * Relay. * Fuse. * Central timer module.	* GO to Pinpoint Test E.
The back window defroster will not shut off automatically	* Central timer module. * Circuit. * Back window defroster. * Relay.	* GO to Pinpoint Test F.

Pinpoint Tests

PINPOINT TEST A : ALL POWER WINDOWS ARE INOPERATIVE

TEST CONDITIONS DETAILS/RESULTS/ACTIONS

A1: CHECK CENTRAL TIMER MODULE FUSE 21 (40A)

1

Ignition switch in position 0.

2

CHECK Fuse F21 (40A).

Is the fuse OK?

Yes

GO to A2.

No

INSTALL a new fuse. TEST the system for normal operation. If the fuse fails again, CHECK for a short to ground. REPAIR as necessary.

A2: CHECK FOR OPEN ON CIRCUITS 14 - AJ7A (VT/BU) AND 15 - DA1 (GN/YE)

1

Ignition switch in position 0.

2

Disconnect Driver power window switch C74.

3

Measure the resistance between the central timer module fuse 21 pin 1, circuit 15 - DA1 (GN/YE) and driver power window switch C74 pin 2, circuit 14 - AJ7A (VT/BU).

Are the resistances less than 5 ohms?

Yes

GO to A3.

No

REPAIR circuits 15 - DA1 (GN/YE) or 14 - AJ7A (VT/BU). TEST the system for normal operation.

A3: CHECK FOR OPEN ON CIRCUIT 31 - AJ7 (BK)

1

Measure the resistance between the driver power window switch C74 pin 3, circuit 31 - AJ7 (BK) and ground.

Is the resistance less than 5 ohms?

Yes

TEST the switch. For additional information, refer to the wiring diagram.

No

REPAIR circuit 31 - AJ7 (BK). TEST the system for normal operation.

PINPOINT TEST B : SINGLE POWER WINDOW IS INOPERATIVE - LEFT FRONT

TEST CONDITIONS DETAILS/RESULTS/ACTIONS

B1: TEST THE DRIVER POWER WINDOW SWITCH

1

Ignition switch in position 0.

2

Disconnect Driver power window switch C74.

3

TEST the driver power window switch. For additional information, refer to the wiring diagram.

Is the switch OK?

Yes

GO to B2.

No

INSTALL a new driver power window switch. TEST the system for normal operation.

B2: CHECK FOR OPEN AND SHORT TO GROUND ON CIRCUIT 33 - AJ15 (YE/GN)

1

Ignition switch in position 0.

2

Disconnect One touch down relay C738.

3

Measure the resistance between the driver power window switch C74 pin 7, circuit 33 - AJ15 (YE/GN) and the one touch down relay C738 pin 3, circuit 33 - AJ15 (YE/GN); and between the one touch down relay C738 pin 3, circuit 33 - AJ15 (YE/GN) and ground.

Is the resistance less than 5 ohms between the two connectors and greater than 10,000 ohms between the relay connector and ground?

Yes

GO to B3.

No

REPAIR circuit 33 - AJ15 (YE/GN). TEST the system for normal operation.

B3: CHECK THE ONE TOUCH DOWN RELAY FOR OPEN CIRCUIT

1

Measure the resistance between the one touch down relay terminals C738 pin 3 and pin 5.

Is the resistance less than 5 ohms?

Yes

GO to B4.

No

INSTALL a new one touch down relay. TEST the system for normal operation.

B4: CHECK FOR OPEN AND SHORT TO GROUND ON CIRCUIT 33 - AJ6 (YE)

1

Disconnect Driver power window motor C782.

2

Measure the resistance between the one touch down relay C738 pin 5, circuit 33 - AJ6 (YE) and the driver power window motor C782 pin 1, circuit 33 - AJ6 (YE); and between the one touch down relay C738 pin 5, circuit 33 - AJ6 (YE) and ground.

Is the resistance less than 5 ohms between the two connectors and greater than 10,000 ohms between the relay connector and ground?

Yes

GO to B5.

No

REPAIR circuit 33 - AJ6 (YE). TEST the system for normal operation.

B5: CHECK FOR OPEN ON CIRCUIT 32 - AJ6 (WH)

1

Connect Driver power window switch C74.

2

Measure the resistance between the driver power window motor C782 pin 2, circuit 32 - AJ6 (WH) and ground.

Is the resistance less than 5 ohms?

Yes

INSTALL a new driver power window motor. TEST the system for normal operation.

No

REPAIR circuit 32 - AJ6 (WH). TEST the system for normal operation.

PINPOINT TEST D : THE ONE TOUCH DOWN FEATURE IS INOPERATIVE

TEST CONDITIONS DETAILS/RESULTS/ACTIONS

D1: CHECK CIRCUIT 14 - AJ16 (VT/OG) FOR VOLTAGE

1

Disconnect One touch down relay C738.

2

Ignition switch in position II.

3

Measure the voltage between the one touch down relay C738 pin 2, circuit 14 - AJ16 (VT/OG) and ground.

Is the voltage greater than 10 volts?

Yes

GO to D2.

No

REPAIR circuit 14 - AJ16 (VT/OG). TEST the system for normal operation.

D2: CHECK FOR OPEN ON CIRCUIT 31 - AJ16 (BK)

1

Ignition switch in position 0.

2

Measure the resistance between the one touch down relay C738 pin 1, circuit 31 - AJ16 (BK) and ground.

Is the resistance less than 5 ohms?

Yes

INSTALL a new one touch down relay. TEST the system for normal operation.

No

REPAIR circuit 31 - AJ16 (BK). TEST the system for normal operation.

PINPOINT TEST F : THE BACK WINDOW DEFROSTER WILL NOT SWITCH OFF AUTOMATICALLY

TEST CONDITIONS DETAILS/RESULTS/ACTIONS

F1: TEST THE BACK WINDOW HEAT SWITCH

1

TEST the back window defroster switch. For additional information, refer to the wiring diagram.

Is the switch OK?

Yes

GO to F2.

No

INSTALL a new back window defroster switch. TEST the system for normal operation.

F2: CHECK THE BACK WINDOW DEFROSTER RELAY SWITCH FOR SHORT

1

TEST the back window defroster relay. For additional information, refer to the wiring diagram.

Is the back window defroster relay OK?

Yes

GO to F3.

No

INSTALL a new back window defroster relay.

TEST the system for normal operation.

F3: CHECK FOR SHORT TO POWER ON CIRCUIT 14S - HB19 (VT/BU)

1

Disconnect Back window defroster C1851a.

2

Disconnect Central timer module C368.

3

Measure the voltage between the back window defroster C1851a, circuit 14S - HB19 (VT/BU) and ground.

Is any voltage present?

Yes

REPAIR circuit 14S - HB19 (VT/BU). TEST the system for normal operation.

No

GO to F4.

F4: CHECK FOR SHORT TO GROUND ON CIRCUIT 14S - HB29 (BK/WH)

1

Disconnect Central timer module C364.

2

Measure the resistance between the central timer module C364 pin 5, circuit 14S - HB29 (BK/WH) and ground.

Is the resistance greater than 10,000 ohms?

Yes

GO to F5.

No

REPAIR circuit 14S - HB29 (BK/WH). TEST the system for normal operation.

F5: CHECK THE CENTRAL TIMER MODULE FOR SHORT TO GROUND

1

Disconnect Central timer module C23.

2

Disconnect Back window defroster relay C56.

3

Measure the resistance between the central timer module C23 pin 12, and ground; and between the central timer module C23 pin 4 and ground.

Are the resistances greater than 10,000 ohms?

Yes

INSTALL a new central timer module. TEST the system for normal operation.

No

INSTALL a new junction box. TEST the system for normal operation.

Component Tests

Back window defroster Switch

For additional information, refer to the wiring diagram.

Back window defroster Relay

For additional information, refer to the wiring diagram.

Back Window Defroster Grid Wire Test

Using a bright lamp inside the vehicle, visually inspect the wire grid from the outside. A broken grid conductor line will appear as a brown spot.

Run the engine at idle. Set the heated back window switch and lights to ON. The heated back window indicator light should illuminate.

Working inside the vehicle with a multimeter, contact the broad red/brown strips on the back 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 back window ground wire connection at the heated back window ground wire screw.

Contact a ground point with the negative lead of the multimeter. The voltage reading should not change.

With the negative lead of the multimeter grounded, touch each grid line of the heated back window at its midpoint 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.

Repair the heated back window grid, refer to the General Procedures in this section.

Mechanical Repairs
5 Body and Paint / 501 Body and Paint
501-11 Glass, Frames and Mechanisms / Description and Operation
Diagnosis and Testing
Glass, Frames and Mechanisms - Vehicles Built Up To: 05-1999

Glass, Frames and Mechanisms - Vehicles Built From: 05-1999 > < Glass, Frames and Mechanisms

Ford Workshop Service and Repair Manuals

Cougar 1999 (08.1998-01.2001)

Mechanical Repairs 5 Body and Paint / 501 Body and Paint 501-11 Glass, Frames and Mechanisms / Description and Operation Diagnosis and Testing Glass, Frames and Mechanisms - Vehicles Built Up To: 05-1999

Mechanical Repairs 5 Body and Paint / 501 Body and Paint 501-11 Glass, Frames and Mechanisms / Description and Operation Diagnosis and Testing Glass, Frames and Mechanisms - Vehicles Built Up To: 05-1999

Mechanical Repairs
5 Body and Paint / 501 Body and Paint
501-11 Glass, Frames and Mechanisms / Description and Operation
Diagnosis and Testing
Glass, Frames and Mechanisms - Vehicles Built Up To: 05-1999

Mechanical Repairs
5 Body and Paint / 501 Body and Paint
501-11 Glass, Frames and Mechanisms / Description and Operation
Diagnosis and Testing
Glass, Frames and Mechanisms - Vehicles Built Up To: 05-1999