Dorman 741-964 Front Driver Side Power Window Regulator and Motor Assembly Instruction Manual

1. Product Overview

The Dorman 741-964 is a complete power window regulator and motor assembly designed for the front driver side (LH) of specific Nissan vehicles. This unit is engineered to provide a direct replacement for the original equipment, ensuring proper fit, function, and performance. It includes both the window motor and the regulator mechanism, facilitating a comprehensive repair solution for inoperative or slow power windows.

This image displays the Dorman 741-964 power window regulator and motor assembly, showing the main components including the motor, cables, and track mechanism.

2. Vehicle Compatibility

This Dorman 741-964 power window regulator and motor assembly is compatible with the front driver side of the following Nissan vehicle models and years:

• Nissan D21: 1989, 1990, 1991, 1992, 1993, 1994
• Nissan Pathfinder: 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995
• Nissan Pickup: 1995, 1996, 1997

Always verify fitment for your specific vehicle by cross-referencing the part number and vehicle specifications before installation.

3. Key Features

• Trustworthy Replacement: Engineered and tested to match the fit, function, and performance of the original window regulator on specified vehicles.
• Quality Assured: Extensively tested by cycling thousands of times in an actual vehicle door to ensure a long, trouble-free service life.
• Easy Installation: Reverse-engineered to match the original equipment shape and dimensions, providing a direct and seamless fit.
• Reliable Design: Developed in North America and supported by extensive automotive aftermarket experience.

A rear view of the Dorman 741-964 assembly, highlighting the motor and the cable routing along the regulator track.

4. Installation Instructions

Installation of a power window regulator and motor assembly requires mechanical aptitude and specific tools. If you are not comfortable performing this procedure, it is recommended to seek assistance from a qualified automotive technician.

General Installation Steps:

1. Safety First: Disconnect the vehicle's battery to prevent electrical shorts or accidental window operation.
2. Remove Door Panel: Carefully remove the interior door panel, trim pieces, and any associated wiring harnesses to access the inner door structure.
3. Access Regulator: Remove the speaker or access cover to gain full access to the window regulator and motor assembly.
4. Support Window Glass: Secure the window glass in the up position using tape or a wedge to prevent it from falling once the regulator is disconnected.
5. Disconnect Old Assembly: Unbolt the window glass from the old regulator. Disconnect the electrical connector from the motor. Unbolt and remove the old regulator and motor assembly from the door.
6. Install New Assembly: Position the new Dorman 741-964 assembly into the door. Bolt it securely into place, ensuring all mounting points align.
7. Connect Window Glass: Carefully lower the window glass and attach it to the new regulator's mounting points. Ensure the glass moves freely within its tracks.
8. Connect Electrical: Plug the electrical connector into the new motor.
9. Test Operation: Reconnect the vehicle's battery. Test the window's up and down operation several times to ensure smooth movement and proper function before reassembling the door panel.
10. Reassemble Door: Reinstall the speaker, access cover, and interior door panel, ensuring all wiring harnesses are properly connected and trim pieces are secured.

An image depicting a technician wearing gloves, in the process of installing a power window regulator into a car door, demonstrating a typical installation scenario.

An X-ray diagram of a car door, indicating the typical placement of a power window regulator assembly within the door panel.

5. Operation

Once installed, the Dorman 741-964 power window regulator and motor assembly operates in conjunction with your vehicle's existing power window switch. Pressing the switch in the 'down' direction will activate the motor to lower the window glass, while pressing it in the 'up' direction will raise the window glass. Ensure the window moves smoothly without obstruction or excessive noise.

A detailed close-up of the electrical connector for the Dorman 741-964 power window motor, showing the two-pin configuration.

6. Maintenance

The Dorman 741-964 power window regulator and motor assembly is designed for long-term, maintenance-free operation. However, to ensure optimal performance and longevity of your vehicle's power windows, consider the following general maintenance tips:

• Keep Window Tracks Clean: Periodically clean the window glass and the rubber channels (weatherstripping) in which the glass slides. Dirt and debris can impede movement and put strain on the motor.
• Lubricate Window Tracks: Apply a silicone-based lubricant to the window channels to reduce friction. Avoid petroleum-based lubricants, as they can damage rubber.
• Inspect Wiring: If accessible, periodically check the electrical connections for corrosion or damage.
• Avoid Overloading: Do not force the window if it encounters an obstruction. This can damage the motor or regulator mechanism.

7. Troubleshooting

If you experience issues with your power window after installation, consider the following troubleshooting steps:

• Window Does Not Move:
  • Check the vehicle's fuse box for a blown fuse related to the power windows.
  • Ensure the electrical connector to the motor is securely plugged in.
  • Verify the window lock-out switch (if present) is not engaged.
• Window Moves Slowly or Jerkily:
  • Inspect window tracks for dirt or debris. Clean and lubricate as described in the Maintenance section.
  • Check for any obstructions in the window path.
  • Ensure the window glass is properly seated in the regulator's clips.
• Unusual Noises During Operation:
  • Squeaking or grinding noises may indicate a need for lubrication in the window tracks.
  • Clicking or popping sounds could suggest an issue with the regulator mechanism or its mounting. Re-check all bolts for tightness.

If these steps do not resolve the issue, further diagnosis by a qualified technician may be necessary.

8. Product Specifications

An angled perspective of the Dorman 741-964 power window regulator, illustrating the full length of the track and the motor unit attached.

9. Warranty and Support

Dorman products are backed by a long history of automotive aftermarket experience and a commitment to quality. For specific warranty information, please refer to the documentation included with your product or visit the official Dorman website.

Dorman also provides resources such as installation and repair training, and ASE Blue Seal certified technical support to assist with product-related inquiries and installation guidance. For technical assistance, please contact Dorman customer support directly.