Sawyer Auto Blower Motor Switch PG-1635420 Instruction Manual

1. Introduction

This manual provides comprehensive instructions for the installation, operation, and maintenance of the Sawyer Auto Blower Motor Switch, model PG-1635420. This component is designed as a direct replacement for the original blower motor switch in 1981-1985 Jeep Scrambler vehicles, controlling the vehicle's heating, ventilation, and air conditioning (HVAC) fan speed.

2. Safety Information

Always observe the following safety precautions during installation and maintenance:

• Disconnect the vehicle's battery before beginning any electrical work to prevent electrical shock or damage to the vehicle's electrical system.
• Wear appropriate personal protective equipment, such as safety glasses and gloves.
• Ensure the vehicle is parked on a level surface with the parking brake engaged.
• If you are unsure about any step, consult a qualified automotive technician.

3. Product Overview

The Sawyer Auto Blower Motor Switch (PG-1635420) is a critical component for controlling the fan speed of your vehicle's HVAC system. It features a robust design for reliable performance and direct compatibility with specified Jeep Scrambler models.

Image 1: Sawyer Auto Blower Motor Switch PG-1635420. This image displays the blower motor switch, showing its metallic housing, electrical terminals, and the threaded shaft for mounting and knob attachment.

4. Installation Instructions

Follow these steps to install the blower motor switch:

1. Prepare the Vehicle: Ensure the vehicle is off and the parking brake is engaged. Disconnect the negative terminal of the vehicle's battery.
2. Access the Switch: Locate the existing blower motor switch, typically found behind the dashboard or control panel. This may require removing trim pieces or the entire control panel assembly. Refer to your vehicle's service manual for specific access procedures.
3. Disconnect Wiring: Carefully disconnect the electrical connector(s) from the old blower motor switch. Note the orientation of the wiring if not clearly marked.
4. Remove Old Switch: Unfasten any mounting hardware (nuts, screws, clips) securing the old switch. Gently pull the old switch out of its mounting location.
5. Install New Switch: Position the new Sawyer Auto Blower Motor Switch (PG-1635420) into the dashboard opening. Secure it with the original mounting hardware.
6. Connect Wiring: Reconnect the electrical connector(s) to the new switch, ensuring a secure and proper connection.
7. Reassemble: Reinstall any removed trim pieces or control panel components.
8. Reconnect Battery: Reconnect the negative terminal of the vehicle's battery.
9. Test Functionality: Start the vehicle and test the blower motor switch at all fan speed settings to ensure proper operation.

5. Operation

The blower motor switch controls the speed of the HVAC system's fan. Rotate the switch knob (if applicable) or press the appropriate button to select the desired fan speed. Typically, settings range from 'Off' to 'Low', 'Medium', and 'High', increasing airflow through the vehicle's vents.

6. Maintenance

The Sawyer Auto Blower Motor Switch is designed for long-term reliability and typically requires minimal maintenance. Periodically inspect the electrical connections for corrosion or looseness. Ensure the switch knob operates smoothly without excessive resistance. If any issues are observed, refer to the troubleshooting section or consult a professional.

7. Troubleshooting

If the blower motor is not functioning correctly after installation, consider the following:

• Blower Not Working: Check the vehicle's fuse box for a blown fuse related to the HVAC blower motor. Ensure all electrical connections to the switch and blower motor are secure.
• Only High Speed Works: This often indicates a faulty blower motor resistor, not the switch itself. The resistor controls lower fan speeds.
• Intermittent Operation: Inspect wiring for loose connections or damaged insulation.
• Switch Feels Loose/Sticky: Ensure the switch is properly mounted and the knob (if removable) is securely attached.

If troubleshooting steps do not resolve the issue, professional diagnosis may be required.

8. Specifications

9. Warranty and Support

Sawyer Auto products are manufactured to high-quality standards. For specific warranty information or technical support, please refer to the product packaging or contact Sawyer Auto customer service through their official channels. Keep your purchase receipt for warranty claims.