Standard Ignition RU-304 HVAC Blower Motor Resistor

Reliable HVAC Blower Motor Resistor for Select GM Vehicles

The Standard Ignition RU-304 HVAC blower motor resistor is designed to restore proper blower motor speed control in your Buick, Cadillac, Oldsmobile, or Pontiac vehicle. Engineered for compatibility with multiple models, this resistor ensures consistent HVAC performance and helps maintain cabin comfort.

• Bolt-on attachment method for secure installation
• Female connector with 2 connectors and 4 cavities
• Supports 3-5 speed blower motor operation
• Includes mounting bracket(s) for easy fitment
• Blade-type male terminals, 4 in total
• Connector shapes include round and square

Product Details and Specifications

The RU-304 blower motor resistor from Standard Ignition is designed to fit a range of General Motors vehicles, including Buick models like the LeSabre and Park Avenue, Cadillac DeVille and Eldorado, Oldsmobile 88 and 98, as well as Pontiac Bonneville and Riviera. This resistor controls the blower motor speeds by regulating electrical current, enabling 3 to 5 speed settings depending on the vehicle's HVAC system.

Featuring a bolt-on attachment method, the resistor mounts securely using the included mounting bracket(s). It connects via two female connectors with four cavities, accommodating blade-type male terminals. The connector shapes are a combination of round and square, ensuring proper fitment with the vehicle's wiring harness (note: wiring harness not included). Hardware and installation instructions are not included, so professional installation or reference to a service manual is recommended.

Compatible Vehicles and Common Applications

This blower motor resistor is compatible with the following makes and models:

• Buick 60 Special, LeSabre, Park Avenue
• Cadillac DeVille, Eldorado, Seville
• Oldsmobile 88, 98
• Pontiac Bonneville, Riviera, Toronado, Commercial Chassis

It is commonly used to address HVAC blower motor issues such as:

• Blower motor only working on high speed
• Inconsistent or no blower motor speeds
• HVAC fan speed control failure
• Intermittent blower motor operation
• Reduced airflow from vents

Installation Notes and Tips

Installation requires removal of the old blower motor resistor and mounting the RU-304 using the bolt-on method with the included bracket(s). Ensure the connectors match the round and square shapes and that the blade terminals align properly. Since hardware and instructions are not included, consult the vehicle’s service manual or a professional technician for proper installation procedures. Verify electrical connections are secure to avoid intermittent blower motor issues.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications for reliable performance. The RU-304 blower motor resistor undergoes quality control testing to ensure durability and proper function. Warranty coverage details should be confirmed with the parts distributor or manufacturer documentation.