Standard Ignition RU-318 HVAC Blower Motor Resistor - Rear

Overview of Standard Ignition HVAC Blower Motor Resistor RU-318

The Standard Ignition HVAC Blower Motor Resistor RU-318 is designed to regulate the blower motor speeds in select Ford and Mazda vehicles. This electronic coil type resistor ensures proper fan speed control for efficient HVAC system performance in models such as the Ford F-150 and Mazda B2300.

• Attachment Method: Bolt on for secure installation
• Coil Type: Electronic for reliable operation
• Connector: Female, rectangular shape with 4 cavities
• Number of Speeds Supported: 3 to 5 speed settings
• Mounting Bracket Included for easy fitment
• Terminal Type: Male blade terminals, quantity of 4
• Hardware not included
• No wiring harness or wires included

Detailed Product Description

The RU-318 blower motor resistor from Standard Ignition is engineered to provide consistent control over the HVAC blower motor speeds in various Ford and Mazda vehicles. Its electronic coil design allows for smooth adjustment across 3 to 5 speed settings, ensuring optimal airflow inside the cabin. The resistor features a bolt-on attachment method and comes with a mounting bracket to facilitate straightforward installation. The connector is female with a rectangular shape and includes four connector cavities, matching the original equipment specifications. Male blade terminals provide secure electrical connections, supporting the resistor’s function without the need for additional wiring harnesses.

Compatible Vehicles and Common Applications

This blower motor resistor is compatible with a range of Ford and Mazda models, including but not limited to:

• Ford F-150, F-250, F-350
• Ford Bronco and Bronco II
• Ford Econoline series (E-150, E-250, E-350, including Club Wagon and Super Duty variants)
• Mazda B2300, B3000, B4000
• Ford Explorer, Ranger, Windstar
• Mazda Navajo

Common Issues Addressed by the RU-318 Resistor

• HVAC blower motor stuck on one speed or no speed control
• Intermittent or no airflow from the vehicle’s heating and cooling system
• Blower motor only working at high speed
• Electrical resistance failure causing inconsistent fan operation
• Overheating or burning smell from the HVAC system

Installation Notes and Tips

• Ensure the vehicle’s ignition is off before beginning installation
• Locate the blower motor resistor, typically near the blower motor housing
• Remove the old resistor by unbolting and disconnecting the electrical connector
• Install the RU-318 resistor using the included mounting bracket and bolt it securely
• Connect the female rectangular connector to the vehicle’s wiring harness
• Test the blower motor speeds to confirm proper operation before reassembling panels

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications. The RU-318 blower motor resistor undergoes quality control testing to ensure durability and reliable performance. While specific warranty details may vary, Standard Ignition typically offers a limited warranty covering defects in material and workmanship. Refer to the product documentation or manufacturer for exact warranty terms.