Standard Ignition RU-37 Ballast Resistor

Brand Standard Ignition RU-37
Connector Gender No Connector
Contents Coil Resistor
Mounting Bracket(s) Included Yes
Terminal Gender Male
Terminal Type Blade
Fits Dodge, Chrysler, Plymouth, Honda, Jeep, Checker, DeSoto, Ford, and Studebaker · 242 vehicles

Ceramic body. Helps dissipate heat for dependable ignition performance.

Nichrome winding. Adds durability and extends service life.

OE-quality control. Made by a global original-equipment ignition manufacturer.

Cross-references Four Seasons 73070, 6R1007 and 50-5500 for the same application. See all 11.

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Ballast Resistor for Classic Chrysler, Dodge, and Jeep Ignition Systems

Standard Ignition RU-37 is a ballast resistor built for primary ignition circuits that need stable resistance and heat management. Its heavy molded ceramic body helps dissipate heat, while the nichrome wire winding supports durable, long-term operation in demanding underhood conditions.

Compatible with a wide range of Chrysler, Dodge, Plymouth, Honda, and Jeep applications, including Dodge D150, Dodge Ramcharger, and Jeep Wagoneer models that use a 2-terminal ballast resistor setup.

Key Features

  • Heavy molded ceramic body for improved heat dissipation
  • Nichrome wire winding for durability and extended service life
  • Blade-style terminals with 2-terminal configuration
  • Male terminal design with no connector required
  • Mounting bracket(s) included for secure installation
  • OE-style ignition service part for primary ignition circuits

Detailed Description

The Standard Ignition RU-37 ballast resistor regulates current in the ignition primary circuit to help maintain proper coil operation on vehicles that use a resistor-based ignition setup. It is a direct-fit service part for many older Dodge, Chrysler, Plymouth, Honda Civic, and Jeep applications, including models with Lean Burn, Electronic Spark Advance, Prestolite ignition, and 2-prong or 2-terminal configurations where specified in the fitment notes. This part cross-references Four Seasons 73070 for the same application.

Standard Ignition has supplied ignition components to the automotive aftermarket since 1919 and manufactures OE ignition products with quality control maintained through the production process. RU-37 is a practical replacement choice when servicing classic ignition systems that rely on a ballast resistor to manage coil current and heat.

Common Problems This Part Can Address

  • Engine no-start conditions caused by a failed ballast resistor
  • Intermittent ignition performance from heat-damaged resistor elements
  • Weak spark related to incorrect primary circuit resistance
  • Hard starting on vehicles with aging Lean Burn or electronic spark advance systems
  • Ignition coil stress from an open or unstable resistor circuit

Installation Notes and Tips

  • Verify terminal style, connector type, and mounting location before installation.
  • Match the vehicle’s ignition system notes, including Lean Burn, Prestolite ignition, or 2-terminal fitment requirements.
  • Inspect the coil, wiring, and connectors for heat damage before replacing the resistor.
  • Confirm the replacement matches the original resistance application for the vehicle.

Quality Assurance

Standard Ignition manufactures ignition components with complete process control from component selection through finished product inspection. RU-37 is built with a ceramic housing and nichrome winding to support consistent electrical performance in primary ignition service.

This part fits 242 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
1994DodgeB150——N/A—
1994DodgeB250——N/A—
1994DodgeB350——N/A—
1994DodgeDakota——N/A2 Terminal Fitment
1993DodgeB150——N/A—
1993DodgeB250——N/A—
1993DodgeB350——N/A—
1993DodgeDakota——N/A2 Terminal Fitment
1992DodgeB150——N/A—
1992DodgeB250——N/A—
1992DodgeB350——N/A—
1992DodgeDakota——N/A2 Terminal Fitment
1991DodgeB150——N/A—
1991DodgeB250——N/A—
1991DodgeB350——N/A—
1991DodgeDakota——N/A2 Terminal Fitment
1990DodgeB150——N/A2 Terminal Fitment
1990DodgeB250——N/A2 Terminal Fitment
1990DodgeB350——N/A2 Terminal Fitment
1990DodgeDakota——N/A2 Terminal Fitment
1989DodgeB150——N/A2 Terminal Fitment
1989DodgeB250——N/A2 Terminal Fitment
1989DodgeB350——N/A2 Terminal Fitment
1989DodgeDakota——N/A2 Terminal Fitment
1988DodgeB150——N/A2 Terminal Fitment
1988DodgeB250——N/A2 Terminal Fitment
1988DodgeB350——N/A2 Terminal Fitment
1988DodgeDakota——N/A2 Terminal Fitment
1987DodgeB150——N/A2 Terminal Fitment
1987DodgeB250——N/A2 Terminal Fitment
1987DodgeB350——N/A2 Terminal Fitment
1986DodgeB150——N/A2 Terminal Fitment
1986DodgeB250——N/A2 Terminal Fitment
1986DodgeB350——N/A2 Terminal Fitment
1986DodgePower Ram 50——N/A—
1986DodgeRam 50——N/A—
1985ChryslerFifth Avenue——N/A—
1985DodgeB150——N/A2 Terminal Fitment
1985DodgeB250——N/A2 Terminal Fitment
1985DodgeB350——N/A2 Terminal Fitment
1985DodgePower Ram 50——N/A—
1985DodgeRam 50——N/A—
1985PlymouthReliant——N/A—
1985PlymouthTurismo——N/Aw/ Electronic Spark Advance
1985PlymouthVoyager2.2LL4N/Aw/ Electronic Spark Advance
1985PlymouthVoyager2.6LL4N/Aw/ Electronic Spark Advance
1984ChryslerFifth Avenue——N/A—
1984ChryslerLaser2.2LL4N/A2 Prong w/ Lean Burn
1984ChryslerLeBaron2.2LL4N/Aw/ Lean Burn
1984ChryslerNew Yorker2.2LL4N/Aw/ Lean Burn
1984ChryslerTown & Country2.2LL4N/Aw/ Lean Burn
1984DodgeB150——N/A2 Terminal Fitment
1984DodgeB250——N/A2 Terminal Fitment
1984DodgeB350——N/A2 Terminal Fitment
1984DodgeD150——N/A2 Terminal Fitment
1984DodgeD250——N/A2 Terminal Fitment
1984DodgeD350——N/A2 Terminal Fitment
1984DodgePower Ram 50——N/A—
1984DodgeRam 50——N/A—
1984DodgeRamcharger——N/A2 Terminal Fitment
1984DodgeW150——N/A2 Terminal Fitment
1984DodgeW250——N/A2 Terminal Fitment
1984DodgeW350——N/A2 Terminal Fitment
1984PlymouthReliant——N/A—
1984PlymouthTurismo——N/Aw/ Electronic Spark Advance
1984PlymouthVoyager2.2LL4N/Aw/ Electronic Spark Advance
1984PlymouthVoyager2.6LL4N/Aw/ Electronic Spark Advance
1983ChryslerFifth Avenue——N/A—
1983ChryslerImperial——N/A—
1983ChryslerLeBaron2.2LL4N/Aw/ Lean Burn
1983ChryslerNew Yorker2.2LL4N/Aw/ Lean Burn
1983ChryslerTown & Country2.2LL4N/Aw/ Lean Burn
1983DodgeB150——N/A2 Terminal Fitment
1983DodgeB250——N/A2 Terminal Fitment
1983DodgeB350——N/A2 Terminal Fitment
1983DodgeD150——N/A2 Terminal Fitment
1983DodgeD250——N/A2 Terminal Fitment
1983DodgeD350——N/A2 Terminal Fitment
1983DodgePower Ram 50——N/A—
1983DodgeRam 50——N/A—
1983DodgeRamcharger——N/A2 Terminal Fitment
1983DodgeW150——N/A2 Terminal Fitment
1983DodgeW250——N/A2 Terminal Fitment
1983DodgeW350——N/A2 Terminal Fitment
1983PlymouthPB150——N/A2 Terminal Fitment
1983PlymouthPB250——N/A2 Terminal Fitment
1983PlymouthPB350——N/A2 Terminal Fitment
1983PlymouthReliant——N/A—
1983PlymouthTurismo——N/A—
1982ChryslerImperial——N/A—
1982ChryslerLeBaron2.2LL4N/Aw/ Lean Burn
1982ChryslerNew Yorker——N/Aw/ Lean Burn
1982DodgeB150——N/A2 Terminal Fitment
1982DodgeB250——N/A2 Terminal Fitment
1982DodgeB350——N/A2 Terminal Fitment
1982DodgeD150——N/A2 Terminal Fitment
1982DodgeD250——N/A2 Terminal Fitment
1982DodgeD350——N/A2 Terminal Fitment
1982DodgeD50——N/A—
1982DodgeRamcharger——N/A2 Terminal Fitment
1982DodgeW150——N/A2 Terminal Fitment
1982DodgeW250——N/A2 Terminal Fitment
1982DodgeW350——N/A2 Terminal Fitment
1982PlymouthPB150——N/A2 Terminal Fitment
1982PlymouthPB250——N/A2 Terminal Fitment
1982PlymouthPB350——N/A2 Terminal Fitment
1982PlymouthReliant——N/A—
1981ChryslerImperial——N/A—
1981ChryslerLeBaron——N/Aw/ Lean Burn
1981ChryslerNew Yorker——N/Aw/ Lean Burn
1981DodgeB150——N/A2 Terminal Fitment
1981DodgeB250——N/A2 Terminal Fitment
1981DodgeB350——N/A2 Terminal Fitment
1981DodgeD150——N/A2 Terminal Fitment
1981DodgeD250——N/A2 Terminal Fitment
1981DodgeD350——N/A2 Terminal Fitment
1981DodgeD50——N/A—
1981DodgeRamcharger——N/A2 Terminal Fitment
1981DodgeW150——N/A2 Terminal Fitment
1981DodgeW250——N/A2 Terminal Fitment
1981DodgeW350——N/A2 Terminal Fitment
1981PlymouthReliant——N/A—
1980ChryslerLeBaron——N/Aw/ Lean Burn; 2 Term.
1980DodgeB100——N/A2 Terminal Fitment
1980DodgeB200——N/A2 Terminal Fitment
1980DodgeB300——N/A2 Terminal Fitment
1980DodgeD150——N/A2 Terminal Fitment
1980DodgeD200——N/A2 Terminal Fitment
1980DodgeD300——N/A2 Terminal Fitment
1980DodgeD50——N/A—
1980DodgeRamcharger——N/A2 Terminal Fitment
1980DodgeW150——N/A2 Terminal Fitment
1980DodgeW200——N/A2 Terminal Fitment
1980DodgeW300——N/A2 Terminal Fitment
1979ChryslerLeBaron——N/Aw/ Lean Burn; 2 Term.
1979DodgeB100——N/A2 Terminal Fitment
1979DodgeB200——N/A2 Terminal Fitment
1979DodgeB300——N/A2 Terminal Fitment
1979DodgeD100——N/A2 Terminal Fitment
1979DodgeD150——N/A2 Terminal Fitment
1979DodgeD200——N/A2 Terminal Fitment
1979DodgeD300——N/A2 Terminal Fitment
1979DodgeRamcharger——N/A2 Terminal Fitment
1979DodgeW150——N/A2 Terminal Fitment
1979DodgeW200——N/A2 Terminal Fitment
1979DodgeW300——N/A2 Terminal Fitment
1978ChryslerLeBaron——N/Aw/ Lean Burn; 2 Term.
1978DodgeB100——N/A2 Terminal Fitment
1978DodgeB200——N/A2 Terminal Fitment
1978DodgeB300——N/A2 Terminal Fitment
1978DodgeD100——N/A2 Terminal Fitment
1978DodgeD150——N/A2 Terminal Fitment
1978DodgeD200——N/A2 Terminal Fitment
1978DodgeD300——N/A2 Terminal Fitment
1978DodgeRamcharger——N/A2 Terminal Fitment
1978DodgeW150——N/A2 Terminal Fitment
1978DodgeW200——N/A2 Terminal Fitment
1978DodgeW300——N/A2 Terminal Fitment
1977ChryslerLeBaron——N/Aw/ Lean Burn; 2 Term.
1977ChryslerNew Yorker——N/Aw/ Lean Burn; 2 Term.
1977ChryslerNewport——N/Aw/ Lean Burn; 2 Term.
1977DodgeAspen——N/A2 Terminal Fitment
1977DodgeB100——N/A2 Terminal Fitment
1977DodgeB200——N/A2 Terminal Fitment
1977DodgeB300——N/A2 Terminal Fitment
1977DodgeCharger——N/A2 Terminal Fitment
1977DodgeD100——N/A2 Terminal Fitment
1977DodgeD150——N/A2 Terminal Fitment
1977DodgeD200——N/A2 Terminal Fitment
1977DodgeD300——N/A2 Terminal Fitment
1977DodgeMonaco——N/A2 Terminal Fitment
1977DodgeRamcharger——N/A2 Terminal Fitment
1977DodgeW100——N/A2 Terminal Fitment
1977DodgeW150——N/A2 Terminal Fitment
1977DodgeW200——N/A2 Terminal Fitment
1977DodgeW300——N/A2 Terminal Fitment
1976ChryslerNew Yorker——N/Aw/ Lean Burn; 2 Term.
1976ChryslerNewport——N/Aw/ Lean Burn; 2 Term.
1976DodgeAspen——N/A2 Terminal Fitment
1976DodgeB100——N/A2 Terminal Fitment
1976DodgeB200——N/A2 Terminal Fitment
1976DodgeB300——N/A2 Terminal Fitment
1976DodgeCharger——N/A2 Terminal Fitment
1976DodgeD100——N/A2 Terminal Fitment
1976DodgeD200——N/A2 Terminal Fitment
1976DodgeD300——N/A2 Terminal Fitment
1976DodgeDart——N/A2 Terminal Fitment
1976DodgeMonaco——N/A2 Terminal Fitment
1976DodgeRamcharger——N/A2 Terminal Fitment
1976DodgeW100——N/A2 Terminal Fitment
1976DodgeW200——N/A2 Terminal Fitment
1976DodgeW300——N/A2 Terminal Fitment
1975ChryslerImperial——N/A2 Terminal Fitment
1975ChryslerNew Yorker——N/Aw/ Lean Burn; 2 Term.
1975ChryslerNewport——N/Aw/ Lean Burn; 2 Term.
1975DodgeB100——N/A—
1975DodgeB200——N/A—
1975DodgeB300——N/A—
1975DodgeCharger——N/A2 Terminal Fitment
1975DodgeD100——N/A2 Terminal Fitment
1975DodgeD200——N/A2 Terminal Fitment
1975DodgeD300——N/A2 Terminal Fitment
1975DodgeDart——N/A2 Terminal Fitment
1975DodgeMonaco——N/A2 Terminal Fitment
1975DodgeRamcharger——N/A2 Terminal Fitment
1975DodgeW100——N/A2 Terminal Fitment
1975DodgeW200——N/A2 Terminal Fitment
1975DodgeW300——N/A2 Terminal Fitment
1974ChryslerImperial——N/A2 Terminal Fitment
1974ChryslerNew Yorker——N/Aw/ Lean Burn; 2 Term.
1974ChryslerNewport——N/Aw/ Lean Burn; 2 Term.
1974DodgeCharger——N/A2 Terminal Fitment
1974DodgeDart——N/A2 Terminal Fitment
1974DodgeMonaco——N/A2 Terminal Fitment
1974DodgeRamcharger——N/A2 Terminal Fitment
1973ChryslerImperial——N/A2 Terminal Fitment
1973ChryslerNew Yorker——N/Aw/ Lean Burn; 2 Term.
1973ChryslerNewport——N/Aw/ Lean Burn; 2 Term.
1973DodgeCharger——N/A2 Terminal Fitment
1973DodgeDart——N/A2 Terminal Fitment
1973DodgeMonaco——N/A2 Terminal Fitment
1973HondaCivic——N/A—
1973JeepCJ5——N/ADistributor Rotor.
1973JeepWagoneer——N/ADistributor Rotor.
1972ChryslerNew Yorker——N/A2 Terminal Fitment
1972JeepCJ5——N/ADistributor Rotor.
1972JeepWagoneer——N/ADistributor Rotor.
1971JeepCJ5——N/Aw/ Prestolite Ignition
1971JeepWagoneer——N/Aw/ Prestolite Ignition
1970JeepCJ5——N/Aw/ Prestolite Ignition
1970JeepWagoneer——N/A—
1969JeepCJ5——N/Aw/ Prestolite Ignition
1969JeepWagoneer——N/A—
1968JeepCJ5——N/Aw/ Prestolite Ignition
1968JeepWagoneer——N/A—
1965JeepWagoneer——N/A—
1963DodgeDart——N/A—
1962DodgeDart——N/A—
1962DodgeLancer——N/A—
1961DodgeDart——N/A—
1961DodgeLancer——N/A—
1960DodgeDart——N/A—
Directly replaces or cross-references 11 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
Four Seasons — 730706R100750-550031572151230976319139962AL795FR51ICR23RU12RUA1069