Keep the right voltage flowing to your ignition coil with the Standard RU-4 Ballast Resistor, also listed as an ignition coil resistor. It is a direct-fit replacement for the listed applications, which span many vehicles, including the 1971-1973 Dodge B200 Van (L6-3.2L, L6-3.7L, V8-5.2L, V8-5.9L, V8-6.6L), 1981-1985 Dodge Aries (L4-2.2L, L4-2.6L) and 1978-1981 Chrysler Cordoba (L6-3.7L, V8-5.2L, V8-5.9L, V8-6.6L). See the "Vehicles it fits" section for the full list of applications and engine codes.
A ballast resistor lowers the voltage reaching the ignition coil while the engine runs, which helps protect the coil from excess current. Signs it may need replacing include an engine that fires while cranking but stalls once the key is released, intermittent stalling, or a no-start. Diagnose the ignition circuit first, because other faults can cause the same symptoms.
The listed applications use one resistor, and this listing is for one unit. Country of origin: United States.
Interchange: RU6 · 4106140 · CR107 · F795 · ICR11 · B8A12250A · B8E12250A · 12336814 · 47222 · 083918101 · ICR11SB · 5213 · RU4T
This part cross-references / interchanges with the following part numbers:
What does a ballast resistor do?
It lowers the voltage reaching the ignition coil while the engine runs, which helps protect the coil from excess current. The Standard RU-4 has a molded ceramic body and a nichrome wire winding.
What signs may mean the ballast resistor needs replacing?
Common signs are an engine that fires while cranking but stalls when the key is released, intermittent stalling, or a no-start. Diagnose the ignition circuit first, since other faults can cause these symptoms.
Does the RU-4 include a mounting bracket?
No, a mounting bracket is not included. The resistor has two male blade terminals for connecting to the vehicle's wiring.
Which vehicles does the RU-4 fit?
It fits many vehicles, including the 1981-1985 Dodge Aries (L4-2.2L, L4-2.6L) and 1978-1981 Chrysler Cordoba (L6-3.7L, V8-5.2L, V8-5.9L, V8-6.6L). See the "Vehicles it fits" section for the full list with engine codes.
How many ballast resistors do I need?
The listed applications use one ballast resistor, and the RU-4 is sold as a single unit.
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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.
