Standard Ignition RU-12 Ballast Resistor

Reliable Ballast Resistor for Chrysler, Dodge, and Plymouth Vehicles

The Standard Ignition RU-12 ballast resistor is designed to provide consistent ignition performance for a range of Chrysler, Dodge, and Plymouth models. Engineered to meet precise resistance specifications, this part ensures stable voltage regulation within the ignition system.

• Cold resistance range: 1.15-1.38 ohms
• Operating resistance: 4.75-5.75 ohms at 25°C
• Four male blade terminals for secure connections
• No connector or mounting brackets included
• Compatible with multiple Chrysler, Dodge, and Plymouth models

Technical Details and Specifications

The RU-12 ballast resistor features a cold resistance between 1.15 and 1.38 ohms, which helps regulate current flow during engine startup. Its operating resistance ranges from 4.75 to 5.75 ohms at 25 degrees Celsius, ensuring optimal ignition coil performance under normal operating conditions. The resistor is equipped with four male blade terminals, providing reliable electrical connections without the need for additional connectors or mounting brackets. This design supports straightforward installation and maintenance.

Compatible Chrysler, Dodge, and Plymouth Models

This ballast resistor is compatible with a wide range of vehicles, including Chrysler models like the Imperial, LeBaron, and New Yorker; Dodge models such as the Challenger, Charger, Dakota, and Ram series; and Plymouth models including the Aspen and Duster variants. The RU-12 part number is specifically suited for ignition systems in these vehicles, ensuring proper fit and function.

Common Applications and Problem Resolution

• Prevents ignition coil overheating by regulating voltage
• Resolves issues with engine misfires related to ignition resistance
• Addresses starting difficulties caused by faulty ballast resistors
• Helps maintain consistent spark timing and engine performance
• Replaces worn or damaged resistors in primary ignition circuits

Installation Notes and Tips

When installing the Standard Ignition RU-12 ballast resistor, ensure the ignition system is powered off to avoid electrical hazards. The resistor’s four male blade terminals should be connected securely to the corresponding wiring harness. Since no mounting brackets are included, verify that the resistor is mounted in a location that prevents vibration and exposure to excessive heat. Proper installation will support reliable ignition system operation.

Quality Assurance and Warranty Information

Standard Ignition parts are manufactured to meet or exceed OEM specifications, providing dependable performance for your vehicle’s ignition system. The RU-12 ballast resistor undergoes rigorous quality control to ensure durability and consistent resistance values. Please refer to Standard Ignition’s warranty policy for coverage details on this part.