HomeElectrical, Lighting and Body > SwitchesStandard Ignition DS-78 Headlight Dimmer Switch
Part #: DS-78

Standard Ignition DS-78 Headlight Dimmer Switch

⚙️ 37 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Chrysler, Dodge, and Plymouth, Fifth Avenue, Diplomat, Gran Fury, Daytona, Cordoba, Imperial, Mirada, PB150, PB250, PB350, LeBaron, New Yorker, Newport, St. Regis, Trailduster, Aspen, CB300, PB100, PB200, PB300, Volare, and Magnum
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Reliable Headlight Dimmer Switch for Chrysler, Dodge, and Plymouth

The Standard Ignition DS-78 headlight dimmer switch is designed to restore proper headlight function in select Chrysler, Dodge, and Plymouth vehicles. Engineered for durability and precise fitment, this switch ensures consistent control of your vehicle's headlight dimming system.

  • Bolt-on attachment method for secure installation
  • Female rectangular connector with one connector for easy wiring
  • Three male blade terminals for reliable electrical contact
  • Designed for dashboard mounting location
  • Operates on standard 12-volt electrical systems

Product Details and Specifications

The DS-78 headlight dimmer switch from Standard Ignition is built to meet OEM specifications for a range of Chrysler, Dodge, and Plymouth models including Aspen, Daytona, Fifth Avenue, Imperial, LeBaron, Magnum, Newport, New Yorker, PB150, PB250, and PB350. Its bolt-on design allows for straightforward replacement without modification. The switch features a female rectangular connector with a single connection point, paired with three male blade terminals to ensure secure and stable electrical connections. Mounted on the dashboard, this switch integrates seamlessly with the vehicle’s existing wiring harness and lighting system, operating reliably on a 12-volt circuit.

Common Applications and Problem Resolution

  • Restores headlight dimming functionality in Chrysler, Dodge, and Plymouth vehicles
  • Replaces faulty or worn-out dimmer switches causing intermittent or no headlight response
  • Eliminates issues with dashboard-mounted headlight controls
  • Solves electrical connection problems related to blade terminal corrosion or damage
  • Ensures consistent voltage supply to headlight circuits for proper operation

Installation Notes and Tips

  • Disconnect the vehicle battery before installation to prevent electrical shorts
  • Locate the existing headlight dimmer switch on the dashboard for removal
  • Remove mounting bolts and disconnect the female rectangular connector carefully
  • Connect the new DS-78 switch ensuring the three male blade terminals align correctly
  • Secure the switch with bolts and test headlight dimming function before reassembling dashboard panels

Quality Assurance and Warranty Information

Standard Ignition manufactures the DS-78 headlight dimmer switch to meet strict quality standards, ensuring reliable performance and durability. This part is backed by a limited warranty against defects in materials and workmanship, providing confidence in its long-term use within compatible Chrysler, Dodge, and Plymouth vehicles.

BrandStandard Ignition
Part NumberDS-78
Attachment MethodBolt On
Connector GenderFemale
Connector ShapeRectangular
Mounting LocationDashboard
Terminal GenderMale
Terminal TypeBlade
Voltage12

This part fits 37 vehicles. Search below:

YearMakeModelPositionNotes
1989ChryslerFifth AvenueN/ANot compatible with vehicles equipped with a Tilt Wheel.
1988ChryslerFifth AvenueN/ANot compatible with vehicles equipped with a Tilt Wheel.
1987ChryslerDaytonaN/ANot compatible with vehicles equipped with a Tilt Wheel.
1987ChryslerFifth AvenueN/ANot compatible with vehicles equipped with a Tilt Wheel.
1986ChryslerDaytonaN/ANot compatible with vehicles equipped with a Tilt Wheel.
1986ChryslerFifth AvenueN/ANot compatible with vehicles equipped with a Tilt Wheel.
1985ChryslerDaytonaN/ANot compatible with vehicles equipped with a Tilt Wheel.
1985ChryslerFifth AvenueN/ANot compatible with vehicles equipped with a Tilt Wheel.
1984ChryslerDaytonaN/ANot compatible with vehicles equipped with a Tilt Wheel.
1984ChryslerFifth AvenueN/ANot compatible with vehicles equipped with a Tilt Wheel.
1983ChryslerFifth AvenueN/ANot compatible with vehicles equipped with a Tilt Wheel.
1983ChryslerImperialN/ANot compatible with vehicles equipped with a Tilt Wheel.
1983PlymouthPB150N/ANot compatible with vehicles equipped with a Tilt Wheel.
1983PlymouthPB250N/ANot compatible with vehicles equipped with a Tilt Wheel.
1983PlymouthPB350N/ANot compatible with vehicles equipped with a Tilt Wheel.
1982ChryslerImperialN/ANot compatible with vehicles equipped with a Tilt Wheel.
1982ChryslerLeBaronN/ANot compatible with vehicles equipped with a Tilt Wheel.
1982ChryslerNew YorkerN/ANot compatible with vehicles equipped with a Tilt Wheel.
1982PlymouthPB150N/ANot compatible with vehicles equipped with a Tilt Wheel.
1982PlymouthPB250N/ANot compatible with vehicles equipped with a Tilt Wheel.
1982PlymouthPB350N/ANot compatible with vehicles equipped with a Tilt Wheel.
1981ChryslerImperialN/ANot compatible with vehicles equipped with a Tilt Wheel.
1981ChryslerLeBaronN/Aw/o Tilt Wheel; Column Mounted
1981ChryslerNew YorkerN/Aw/o Tilt Wheel; Column Mounted
1981ChryslerNewportN/Aw/o Tilt Wheel; Column Mounted
1981PlymouthPB150N/ANot compatible with vehicles equipped with a Tilt Wheel.
1981PlymouthPB250N/ANot compatible with vehicles equipped with a Tilt Wheel.
1981PlymouthPB350N/ANot compatible with vehicles equipped with a Tilt Wheel.
1980ChryslerLeBaronN/Aw/o Tilt Wheel; Column Mounted
1980ChryslerNew YorkerN/Aw/o Tilt Wheel; Column Mounted
1980ChryslerNewportN/Aw/o Tilt Wheel; Column Mounted
1980DodgeAspenN/Aw/o Tilt Wheel; Column Mounted
1979ChryslerLeBaronN/Aw/o Tilt Wheel; Column Mounted
1979ChryslerNew YorkerN/Aw/o Tilt Wheel; Column Mounted
1979ChryslerNewportN/Aw/o Tilt Wheel; Column Mounted
1979DodgeAspenN/Aw/o Tilt Wheel; Column Mounted
1979DodgeMagnumN/Aw/o Tilt Wheel; Column Mounted

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

123214801S4839374751553-16982DS123DS124DS131UDS429

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.