HomeHVAC > Motors, Core, Case and Related ComponentsStandard Ignition RU-485 HVAC Blower Motor Resistor
Part #: RU-485

Standard Ignition RU-485 HVAC Blower Motor Resistor

⚙️ 52 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$24.25Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Dodge, D150, D250, D350, Ramcharger, W150, W250, W350, D100, and W100
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Standard Ignition HVAC Blower Motor Resistor RU-485

The Standard Ignition HVAC Blower Motor Resistor RU-485 is designed to regulate the blower motor speeds in select Dodge trucks and SUVs. This resistor supports 3 to 5 speed settings, ensuring precise control of your vehicle's heating and cooling system.

  • Attachment method: Screw mount for secure installation
  • Connector gender: No connector included
  • Hardware and mounting brackets: Not included
  • Number of speeds supported: 3-5 speed operation
  • Terminal type: 3 male blade terminals
  • Wiring harness: Not included

Detailed Product Description

The RU-485 blower motor resistor by Standard Ignition is engineered for compatibility with Dodge D100, D150, D250, D350, Ramcharger, W100, W150, W250, and W350 models. It features a screw attachment method that ensures a stable and reliable fit within the HVAC system. The resistor has three male blade terminals and does not include a wiring harness or mounting brackets, which allows for straightforward integration with existing vehicle components. This part supports multiple blower motor speeds, ranging from three to five, providing flexible climate control options for your Dodge vehicle.

Common Applications and Issues Addressed

  • Restores proper blower motor speed control in Dodge D-series trucks and Ramcharger models
  • Resolves blower motor stuck on one speed or no speed issues
  • Fixes intermittent blower motor operation or failure to engage
  • Eliminates overheating or burning smell caused by faulty resistors
  • Improves HVAC system reliability and passenger comfort

Installation Notes and Tips

  • Ensure the vehicle is powered off before installation
  • Use appropriate screwdrivers for the screw attachment method
  • Verify the resistor terminals align correctly with the vehicle’s wiring harness
  • Check for corrosion or damage on blade terminals before installation
  • Consult vehicle service manual for specific resistor location and removal instructions

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications for fit and function. The RU-485 blower motor resistor undergoes rigorous quality control to ensure durability and consistent performance. While no specific warranty details are provided here, Standard Ignition typically offers limited warranties on their replacement parts. Refer to the product packaging or manufacturer documentation for exact warranty terms.

BrandStandard Ignition
Part NumberRU-485
Attachment MethodScrew
Connector GenderNo Connector
Hardware IncludedNo
Harness Length - cmNo wire
Harness Length - inchesNo wire
Mounting Bracket(s) IncludedNo
Number Of Speeds3-5 Speed
Terminal GenderMale
Terminal TypeBlade
Wiring Harness IncludedNo

This part fits 52 vehicles. Search below:

YearMakeModelPositionNotes
1990DodgeD150N/A
1990DodgeD250N/A
1990DodgeD350N/A
1990DodgeRamchargerN/A
1990DodgeW150N/A
1990DodgeW250N/A
1990DodgeW350N/A
1989DodgeD100N/A
1989DodgeD150N/A
1989DodgeD250N/A
1989DodgeD350N/A
1989DodgeRamchargerN/A
1989DodgeW100N/A
1989DodgeW150N/A
1989DodgeW250N/A
1989DodgeW350N/A
1988DodgeD100N/A
1988DodgeD150N/A
1988DodgeD250N/A
1988DodgeD350N/A
1988DodgeRamchargerN/A
1988DodgeW100N/A
1988DodgeW150N/A
1988DodgeW250N/A
1988DodgeW350N/A
1987DodgeD100N/A
1987DodgeD150N/A
1987DodgeD250N/A
1987DodgeD350N/A
1987DodgeRamchargerN/A
1987DodgeW100N/A
1987DodgeW150N/A
1987DodgeW250N/A
1987DodgeW350N/A
1986DodgeD100N/A
1986DodgeD150N/A
1986DodgeD250N/A
1986DodgeD350N/A
1986DodgeRamchargerN/A
1986DodgeW100N/A
1986DodgeW150N/A
1986DodgeW250N/A
1986DodgeW350N/A
1985DodgeD100N/A
1985DodgeD150N/A
1985DodgeD250N/A
1985DodgeD350N/A
1985DodgeRamchargerN/A
1985DodgeW100N/A
1985DodgeW150N/A
1985DodgeW250N/A
1985DodgeW350N/A

* 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:

2068242610504P134853-69621BMRA238BR388RU1178

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