HomeHVAC > Motors, Core, Case and Related ComponentsStandard Ignition RU-381 HVAC Blower Motor Resistor - Front or Rear
Part #: RU-381

Standard Ignition RU-381 HVAC Blower Motor Resistor - Front or Rear

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⚙️ 26 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford, Mercury, and Lincoln, Explorer Sport Trac, Mountaineer, Expedition, Explorer, and Aviator
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Reliable HVAC Blower Motor Resistor for Ford, Lincoln, and Mercury

The Standard Ignition RU-381 HVAC blower motor resistor is designed to restore proper blower motor speed control in select Ford, Lincoln, and Mercury vehicles. Engineered for durability and precise fitment, this resistor ensures consistent HVAC performance in models like the Ford Explorer and Lincoln Aviator.

Key Features of the Standard Ignition RU-381

  • Bolt-on attachment method for secure installation
  • Female rectangular connector with 4 cavities
  • Supports 3 to 5 blower motor speeds
  • Includes mounting bracket(s) for easy setup
  • Blade-type male terminals, 4 in total
  • No wiring harness included, designed for direct connection

Detailed Product Description

The RU-381 blower motor resistor from Standard Ignition is engineered to regulate the blower motor speeds in HVAC systems of Ford, Lincoln, and Mercury vehicles, including the Expedition, Explorer Sport Trac, and Mountaineer. Featuring a bolt-on attachment method, this resistor offers a straightforward installation process. The female rectangular connector with four cavities ensures a secure electrical connection, while the blade-type male terminals provide reliable contact. This resistor supports multiple blower speeds, ranging from 3 to 5, allowing for precise climate control. The included mounting bracket(s) facilitate proper positioning within the HVAC system. Note that this part does not include a wiring harness or additional hardware, designed to integrate seamlessly with existing vehicle components.

Common Applications and Issues Addressed

  • Restores blower motor speed control in Ford Explorer and Lincoln Aviator HVAC systems
  • Resolves blower motor stuck on one speed or no speed
  • Fixes intermittent blower motor operation or failure to operate
  • Eliminates overheating issues related to faulty blower motor resistors
  • Addresses inconsistent airflow from HVAC vents

Installation Notes and Tips

  • Ensure vehicle compatibility with Ford, Lincoln, and Mercury models such as Aviator, Expedition, and Mountaineer before installation
  • Disconnect the battery prior to installation to prevent electrical shorts
  • Use the included mounting bracket(s) to secure the resistor firmly in place
  • Verify the connector orientation matches the female rectangular connector with 4 cavities
  • Check the blade-type male terminals for corrosion or damage before connecting

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. The RU-381 blower motor resistor undergoes rigorous quality control testing to maintain consistent operation within HVAC systems. Please refer to Standard Ignition's warranty policy for specific coverage details.

BrandStandard Ignition
Part NumberRU-381
Attachment MethodBolt On
Connector GenderFemale
Connector ShapeRectangular
Hardware IncludedNo
Harness Length - cmNo wire
Harness Length - inchesNo wire
Mounting Bracket(s) IncludedYes
Number Of Connector Cavities4
Number Of Speeds3-5 Speed
Terminal GenderMale
Terminal TypeBlade
Wiring Harness IncludedNo

This part fits 26 vehicles. Search below:

YearMakeModel# DoorsPositionNotes
2007FordExplorer Sport TracFrontw/o Auto. Temp Control; To 12/06
2007MercuryMountaineerRearTo 12/06
2006FordExpeditionFrontFitment: Excludes vehicles with automatic temperature control.
2006FordExplorerFrontNot compatible with automatic AC systems.
2006FordExplorerRear
2006MercuryMountaineerFrontNot compatible with automatic AC systems.
2005FordExpeditionFrontw/ Manual Control
2005FordExplorerFrontNot compatible with automatic AC systems.
2005FordExplorerRear
2005LincolnAviatorN/AFitment: Excludes vehicles with automatic temperature control.
2005MercuryMountaineerFrontNot compatible with automatic AC systems.
2004FordExpeditionFrontw/ Manual Control
2004FordExplorerFrontNot compatible with automatic AC systems.
2004FordExplorerRear
2004LincolnAviatorN/AFitment: Excludes vehicles with automatic temperature control.
2004MercuryMountaineerFrontNot compatible with automatic AC systems.
2003FordExpeditionFrontw/ Manual Control
2003FordExplorer4 DoorFrontNot compatible with automatic AC systems.
2003FordExplorer4 DoorRear
2003LincolnAviatorN/AFitment: Excludes vehicles with automatic temperature control.
2003MercuryMountaineerFrontNot compatible with automatic AC systems.
2002FordExplorer4 DoorFrontNot compatible with automatic AC systems.
2002FordExplorer4 DoorRear
2002MercuryMountaineerFrontNot compatible with automatic AC systems.
2001MercuryMountaineerRear
2001MercuryMountaineerFrontFitment: Excludes vehicles with automatic temperature control.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

1L2Z19A706AA203012BMR02924P136653-69633973-951BMR45BMRA8BR285MT1882RU1075RUA1029V25-79-0016YH1716

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.