4720278 973-020 HVAC Fan Blower Motor Resistor

Key Features

• Direct-fit replacement for the original equipment (OE) component.
• Restores full functionality to the vehicle's heating and air conditioning fan speed controls.
• Engineered with robust materials to ensure reliability and a long service life.
• Includes resistor and wiring harness pigtail for a complete installation.

Replaces / Cross-Reference Part Numbers

• 4720278
• 973-020
• 68004241AA
• 68004539AA
• 5012212AA
• RU109
• RU876
• CR153

Compatibility & Fitment

• Dodge:
  • Ram 1500 (1994-2008)
  • Ram 2500 (1994-2009)
  • Ram 3500 (1994-2009)
• Jeep:
  • Grand Cherokee (1993-1999)

When to Replace

• The HVAC fan only works on the highest setting.
• Fan speed cannot be adjusted or works intermittently.
• No air blows from the vents at any speed setting.
• The original resistor or connector shows signs of burning or corrosion.

Installation Tips

• Disconnect the negative battery terminal before starting the replacement.
• Locate the resistor, typically under the passenger-side dashboard, mounted in the HVAC air duct.
• Disconnect the electrical harness and remove the screws securing the old resistor.
• Thoroughly inspect the electrical connector for melting or damage; replace if needed.
• Securely install the new resistor before reconnecting the harness and battery.