Dorman 645-729 HVAC Blower Motor Resistor Connector

Dorman 645-729 HVAC Blower Motor Resistor Connector

Dorman 645-729 is an HVAC blower motor resistor connector for vehicles with manual air conditioning controls. It replaces an original connector that has been damaged by corrosion or overheating, helping restore a secure electrical connection at the blower motor resistor circuit.

• Female blade terminals for a direct-style electrical connection
• 16-gauge wire construction for HVAC circuit repair
• Tin brass terminals with tin plating for corrosion resistance
• 16.14 in. overall length for serviceable routing
• Designed for manual air conditioning control systems
• Cross-reference: Ford OE 7T4Z19C603B for the same application

Built for HVAC Electrical Repair

This blower motor resistor connector is built around the key service details that matter in HVAC repairs: 4-wire layout, female blade terminals, and corrosion-resistant terminal material. It is a practical replacement for damaged connector ends in Toyota Corolla, Toyota Matrix, Toyota RAV4, Toyota Sienna, Scion tC, Scion xB, Ford Edge, and Lincoln MKX applications with manual air conditioning controls. Use Dorman 645-729 when the original connector shows heat damage, terminal wear, or corrosion at the resistor connection point.

Common Problems This Connector Can Address

• Blower motor stops working because the connector is heat-damaged
• Intermittent HVAC fan operation from corroded terminals
• Loose or weakened electrical contact at the resistor plug
• Connector housing damage from overheating at the blower circuit
• Restoration of blower motor resistor wiring after connector failure

Installation Notes and Fitment

Compatible With 2011-2014 Scion tC, w/Manual Air Conditioning Controls; 2008-2014 Scion xB, w/Manual Air Conditioning Controls; 2014 Toyota Corolla, Built in U.S.A.; w/Manual Air Conditioning Controls; 2009-2014 Toyota Matrix, w/Manual Air Conditioning Controls; 2006-2014 Toyota RAV4, w/Manual Air Conditioning Controls; 2008-2013 Toyota Corolla, w/Manual Air Conditioning Controls; 2007-2010 Ford Edge; 2007-2010 Lincoln MKX; 2003-2010 Toyota Sienna; 2003-2008 Toyota Matrix; 2003-2007 Toyota Corolla, Built in Japan; w/Manual Air Conditioning Controls.

Inspect the resistor and surrounding wiring before installation. If the original connector was overheated, repair any damaged terminals or wiring before connecting the replacement pigtail. Confirm manual air conditioning control configuration and vehicle build details where noted for Toyota Corolla applications.

Quality Assurance

Dorman manufactures replacement electrical connectors with application-specific fitment and corrosion-resistant terminal materials. Part number 645-729 is engineered as an OE-style service replacement for HVAC blower motor resistor repairs.