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Standard Ignition DS-40 Headlight Dimmer SwitchOE Quality 60-Day Returns
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Part #: DS-40

Standard Ignition DS-40 Headlight Dimmer Switch

⚙️ 88 vehicles fit this part
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✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: International, Jeep, Buick, Cadillac, Oldsmobile, Studebaker, Pontiac, Packard, GMC, Hudson, Kaiser, Chevrolet, Henry J, Chrysler, Nash, Frazer, Ford, Hupmobile, Auburn, Plymouth, American Austin, and Franklin, 1000D, Wagoneer, FC150, FC170, Century, Limited, Roadmaster, Special, Super, Commercial Chassis, DeVille, Eldorado, Series 60 Fleetwood, Series 62, Series 70 Fleetwood Eldorado, Series 75 Fleetwood, 98, Dynamic 88, Fiesta, Super 88, 3E1, 3E10, 3E11, 3E11D, 3E12, 3E12D, 3E13, 3E14, 3E5, 3E6, 3E6D, 3E7, 3E7D, Champion, Commander, Golden Hawk, President, Scotsman, Silver Hawk, Taxi, Transtar, A102, A110, A112, A120, A122, A130, A132, AB120, AM120, AM130, AM132, AM80, S100, S102, S110, S112, S120, S122, S130, S132, SA120, SA122, SM120, SM122, SM130, SM132, 88, Starfire, Bonneville, Catalina, Chieftain, Star Chief, Super Chief, Caribbean, Clipper, Executive, Four-Hundred, Patrician, E10, E11, E12, E13, E14, E15, E16, E17, E28, E38, E5, E6, E7, Flight Hawk, Police Car, Power Hawk, Sky Hawk, 100, 100-22, 150, 150-22, 250, 250-22, 280-22, 300, 350-8, 370, F350, F370, FM340, FM350, M300, M340, PM150, PM151, PM152, PM153, PM250, PM252, PM253, S300, S370, Truck, Rambler, R120, R121, R122, R130, and R131
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Reliable Headlight Dimmer Switch for Classic GM and Chrysler Vehicles

The Standard Ignition DS-40 headlight dimmer switch is designed for floor-mounted installation, providing dependable control of your vehicle's headlight brightness. Engineered with a durable cast iron finish and a bolt-on attachment method, this switch is compatible with a range of Buick, Cadillac, Chevrolet, Chrysler, Jeep, Oldsmobile, and Pontiac models.

  • Bolt-on attachment method for secure installation
  • Durable cast iron construction with silver color finish
  • Floor-mounted design for easy access and replacement
  • Three male blade terminals for reliable electrical connections
  • Operates on standard 12-volt electrical systems

Durable Construction and Precise Fitment

The DS-40 headlight dimmer switch features a robust cast iron body finished in silver, ensuring long-lasting performance under typical automotive conditions. Its floor-mounted design aligns with original equipment specifications for many classic and vintage vehicles, including models such as the Chevrolet Bel Air, Pontiac Bonneville, Cadillac DeVille, and Jeep Wagoneer. The switch includes three male blade terminals, providing secure and straightforward electrical connections compatible with 12-volt systems. The bolt-on attachment method simplifies installation and replacement, maintaining the integrity of your vehicle's electrical system.

Compatible Vehicles and Applications

This headlight dimmer switch is compatible with a variety of classic and vintage vehicles, including:

  • Buick Century and Skylark
  • Cadillac Eldorado and New Yorker
  • Chevrolet Corvette and Commercial Chassis
  • Chrysler Imperial and Town & Country
  • Jeep Wagoneer
  • Oldsmobile 88 and 98
  • Pontiac Catalina and Starfire

Common Issues Addressed by the DS-40 Headlight Dimmer Switch

  • Intermittent or non-functioning headlight dimming
  • Loose or faulty electrical connections causing flickering lights
  • Wear and corrosion on original switch components
  • Difficulty in controlling high and low beam headlights
  • Replacement for damaged or broken floor-mounted dimmer switches

Installation Notes and Tips

  • Ensure vehicle battery is disconnected before installation
  • Locate the floor-mounted dimmer switch under the dashboard or near the driver’s side footwell
  • Use appropriate tools to remove the bolt-on switch carefully
  • Verify terminal connections match the original wiring harness with three male blade terminals
  • Test headlight operation after installation to confirm proper function

Quality Assurance and Warranty

Standard Ignition manufactures the DS-40 headlight dimmer switch to meet or exceed OEM specifications for fit, form, and function. The cast iron construction and quality terminals ensure durability and reliable performance. While specific warranty details may vary, Standard Ignition products typically include a limited warranty against defects in materials and workmanship to provide confidence in your purchase.

BrandStandard Ignition
Part NumberDS-40
Attachment MethodBolt On
ColorSilver
FinishCast Iron
Mounting LocationFloor Mounted
Terminal GenderMale
Terminal TypeBlade
Voltage12

This part fits 88 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1970JeepWagoneer3.8LL6N/A
1970JeepWagoneer5.7LV8N/A
1958BuickCenturyN/A
1958BuickRoadmasterN/A
1958CadillacCommercial ChassisN/A
1958CadillacDeVilleN/A
1958CadillacEldoradoN/A
1958Oldsmobile98N/A
1957BuickCenturyN/A
1957BuickRoadmasterN/A
1957CadillacCommercial ChassisN/A
1957CadillacDeVilleN/A
1957CadillacEldoradoN/A
1957Oldsmobile88N/A
1957Oldsmobile98N/A
1957OldsmobileStarfireN/A
1957PontiacBonnevilleN/A
1957PontiacCatalinaN/A
1956BuickCenturyN/A
1956BuickRoadmasterN/A
1956CadillacCommercial ChassisN/A
1956CadillacDeVilleN/A
1956CadillacEldoradoN/A
1956Oldsmobile88N/A
1956Oldsmobile98N/A
1956PontiacCatalinaN/A
1955BuickCenturyN/A
1955BuickRoadmasterN/A
1955CadillacCommercial ChassisN/A
1955CadillacDeVilleN/A
1955CadillacEldoradoN/A
1955Oldsmobile88N/A
1955Oldsmobile98N/A
1955PontiacCatalinaN/A
1954BuickCenturyN/A
1954BuickRoadmasterN/A
1954BuickSkylarkN/A
1954CadillacCommercial ChassisN/A
1954CadillacDeVilleN/A
1954CadillacEldoradoN/A
1954ChevroletBel AirN/A
1954ChevroletCorvetteN/A
1954Oldsmobile88N/A
1954Oldsmobile98N/A
1954PontiacCatalinaN/A
1953BuickRoadmasterN/A
1953CadillacCommercial ChassisN/A
1953CadillacDeVilleN/A
1953CadillacEldoradoN/A
1953ChevroletBel AirN/A
1953ChevroletCorvetteN/A
1953Oldsmobile98N/A
1953PontiacCatalinaN/A
1952BuickRoadmasterN/A
1952CadillacCommercial ChassisN/A
1952ChevroletBel AirN/A
1952ChryslerImperialN/A
1952ChryslerNew YorkerN/A
1952Oldsmobile98N/A
1952PontiacCatalinaN/A
1951BuickRoadmasterN/A
1951CadillacCommercial ChassisN/A
1951ChevroletBel AirN/A
1951ChryslerImperialN/A
1951ChryslerNew YorkerN/A
1951Oldsmobile98N/A
1951PontiacCatalinaN/A
1950BuickRoadmasterN/A
1950CadillacCommercial ChassisN/A
1950ChevroletBel AirN/A
1950ChryslerImperialN/A
1950ChryslerNew YorkerN/A
1950Oldsmobile88N/A
1950Oldsmobile98N/A
1950PontiacCatalinaN/A
1949CadillacCommercial ChassisN/A
1949ChryslerImperialN/A
1949ChryslerNew YorkerN/A
1949ChryslerTown & CountryN/A
1948CadillacCommercial ChassisN/A
1948ChryslerNew YorkerN/A
1948ChryslerTown & CountryN/A
1947CadillacCommercial ChassisN/A
1947ChryslerNew YorkerN/A
1947ChryslerTown & CountryN/A
1946CadillacCommercial ChassisN/A
1946ChryslerNew YorkerN/A
1946ChryslerTown & CountryN/A

* 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:

1233870312650241S48222H18553030355-80253-16967DS100DS101DS118TC6744UDS401

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

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