Dorman 973-503 HVAC Blower Motor Resistor Kit

Reliable HVAC Blower Motor Resistor Kit for Buick and Chevrolet

The Dorman 973-503 HVAC Blower Motor Resistor Kit is designed to restore proper blower motor function in select Buick, Chevrolet, Oldsmobile, and Pontiac vehicles. This kit includes a blower motor resistor and a 16-inch wiring harness to ensure a secure and efficient electrical connection.

Key Features of the Dorman 973-503 Blower Motor Resistor Kit

• Includes 1 blower motor resistor and 1 wiring harness with a 16-inch length
• Features 4 wires and 4 terminals with blade terminal type for reliable connectivity
• Connector quantity: 1 female connector designed for secure fitment
• Mounting hardware not included; kit has 3 mounting holes for installation
• Terminal gender includes both male and female terminals for compatibility
• Wiring harness included for straightforward replacement

Detailed Description and Compatibility

This Dorman HVAC blower motor resistor kit (part number 973-503) is engineered to meet the electrical requirements of HVAC systems in Buick Cutlass Supreme, Chevrolet Lumina, Monte Carlo, Oldsmobile Regal, and Pontiac Grand Prix models. The included wiring harness with blade terminals ensures a proper electrical connection, while the three mounting holes allow for secure installation. The female connector and mixed terminal genders provide compatibility with factory wiring harnesses, making this kit a practical replacement part for restoring blower motor speed control.

Common HVAC Issues Addressed by This Resistor Kit

• Blower motor only works on high speed or fails to operate at lower speeds
• Intermittent blower motor operation or inconsistent airflow
• Electrical resistance failure causing HVAC system malfunction
• Overheating or burning smell from the blower motor resistor area
• Complete loss of blower motor function in compatible Buick and Chevrolet models

Installation Notes and Tips

Before installation, disconnect the vehicle battery to prevent electrical shorts. This kit does not include mounting hardware, so retain original screws or source compatible fasteners. The 16-inch wiring harness allows for flexible routing during installation. Ensure the female connector is securely attached to the vehicle’s wiring harness and that all terminals are properly seated. Verify blower motor operation at all speed settings after installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM specifications for fit and function. The 973-503 blower motor resistor kit undergoes quality testing to ensure durability and reliable performance in HVAC systems. Warranty coverage details can be obtained from the product documentation or the manufacturer’s website.