Keep steady voltage flowing to the ignition coil with the Standard Ignition Ballast Resistor RU-23 (also cataloged as an Ignition Coil Resistor). A ballast resistor limits current to the coil once the engine is running, dropping the coil's operating voltage to help prevent it from overheating. It drops in as a direct-fit replacement for the listed applications, including the 1978 Dodge Challenger [L4-1.6L, L4-2.6L], 1971-1972 and 1976-1983 Dodge Colt [L4-1.4L, L4-1.6L, L4-2.0L, L4-2.6L], 1986-1989 Hyundai Excel [L4-1.5L], 1983 Mitsubishi Montero [L4-2.6L], 1976-1980 Plymouth Arrow [L4-1.6L, L4-2.0L, L4-2.6L], 1979-1982 Plymouth Champ [L4-1.4L, L4-1.6L], 1978-1983 Plymouth Colt [L4-1.4L, L4-1.6L, L4-2.0L, L4-2.6L], 1978-1980 Plymouth Sapporo [L4-1.6L, L4-2.6L], and 1981-1982 Toyota Starlet [L4-1.3L]. See the Buyer's Guide tab for the full application list.
From a manufacturer serving the automotive aftermarket since 1919, with quality control maintained throughout the manufacturing process. Country of origin: Taiwan. If a failed ballast resistor is the cause of your no-run or warm-stall condition, this replaces it. Interchange: RU500 · MD603200 · MD603208 · MD603229 · CR126 · ICR34 · 2735021050 · 9091904035. Manufacturer part number RU-23.
This part cross-references / interchanges with the following part numbers:
What does a ballast resistor do?
It limits current to the ignition coil while the engine runs, dropping the coil's operating voltage to help keep it from overheating.
Will this fit my vehicle?
It's a direct-fit replacement for the listed applications, such as the Dodge Colt, Plymouth Arrow, Hyundai Excel, and Toyota Starlet. Check the Buyer's Guide tab for the full year-make-model-engine list.
What numbers does the RU-23 interchange with?
It replaces RU500, MD603200, MD603208, MD603229, CR126, ICR34, 2735021050, and 9091904035. The manufacturer part number is RU-23.
What are signs the ballast resistor may need replacing?
Hard starting or an engine that stalls when the key returns from start to run can be signs. Diagnose the circuit first, since these symptoms can have other causes.
Is a mounting bracket included?
No, mounting bracket(s) are not included with this ballast resistor. Consult the vehicle service information for the correct mounting hardware.
WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
