Dorman 973-556 HVAC Blower Motor Resistor Kit

Dorman 973-556 HVAC Blower Motor Resistor Kit

Dorman 973-556 is an HVAC blower motor resistor kit for vehicles with an overheated or corroded original resistor and damaged connector wiring. It includes a replacement resistor and harness pigtail to restore blower speed control on select Ford trucks and SUVs.

Key Features

• Replacement HVAC blower motor resistor kit for blower speed control repair
• Includes a resistor and wire harness pigtail for connector-side repair
• Female connector with male blade terminals
• 4-wire harness with 6-inch wiring harness length
• 2 mounting holes for OE-style installation
• Package contents: 1 blower motor resistor; 1 wire harness

Detailed Description

This Dorman blower motor resistor kit is built for select Ford applications where the original resistor has failed from heat damage or corrosion. It is a direct-fit electrical repair solution for HVAC systems on 1980-1986 Ford Bronco, 1980-1986 Ford F-150, 1980-1986 Ford F-250, 1980-1986 Ford F-350, and 1980-1983 Ford F-100, including Integral AC or Hi-Lo Vent configurations. The part number 973-556 is also a useful reference when sourcing an OE-style replacement for these Ford HVAC blower motor resistor repairs.

This part cross-references Dorman 973-556 applications with OE-style replacement numbers such as E3TZ19A706B and RU439 for the same application.

What It Helps Fix

• Blower motor speeds that stop working or work intermittently
• Heat-damaged resistor terminals or corroded connector pins
• HVAC fan operation limited to one speed
• Electrical resistance issues in the blower control circuit
• Connector damage at the resistor harness interface

Installation Notes

Verify connector style, terminal count, and mounting-hole layout before installation. This kit uses a 4-wire harness with blade terminals and a female connector, so the existing HVAC connector should match the OE-style repair path. Confirm vehicle-specific fitment for 1980-1986 Ford Bronco, F-150, F-250, and F-350, plus 1980-1983 Ford F-100, especially on Integral AC or Hi-Lo Vent systems. The part number 973-556 should be matched to the vehicle’s original resistor location and wiring condition before service.

Quality Assurance

Dorman supplies replacement electrical components engineered for direct-fit service on listed applications. This resistor kit is intended to replace a failed original resistor and harness connection on the specified Ford HVAC systems.