HomeElectrical, Lighting and Body > SwitchesStandard Ignition DS-645 Headlight Switch
Part #: DS-645

Standard Ignition DS-645 Headlight Switch

⚙️ 13 vehicles fit this part
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Select your vehicle to confirm fitment
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick, Chevrolet, and Oldsmobile, Commercial Chassis, Roadmaster, Caprice, and Custom Cruiser
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Overview of Standard Ignition Headlight Switch DS-645

The Standard Ignition DS-645 headlight switch is designed for reliable operation in select Buick, Chevrolet, and Oldsmobile vehicles. This direct snap fit switch provides a precise and durable solution for controlling your vehicle's headlights, ensuring consistent performance in models like the Caprice, Commercial Chassis, Custom Cruiser, and Roadmaster.

  • Direct, snap fit attachment method for secure installation
  • Single rectangular connector with no connector gender
  • Six male blade terminals for reliable electrical connections
  • Operates at 12 volts, compatible with standard automotive electrical systems
  • Specifically designed for Buick, Chevrolet, and Oldsmobile headlight systems

Technical Details and Features

The DS-645 headlight switch features a direct snap fit attachment method, allowing for straightforward installation without additional hardware. It includes one rectangular connector designed without a specific gender, simplifying compatibility with existing wiring harnesses. The switch is equipped with six male blade terminals, providing secure and stable electrical connections essential for headlight operation. Operating at 12 volts, this switch meets the electrical requirements of the specified vehicle models, ensuring proper function within their lighting systems.

Compatible Vehicles and Applications

This headlight switch is compatible with several GM vehicles, including Buick Caprice, Chevrolet Commercial Chassis, Chevrolet Custom Cruiser, and Oldsmobile Roadmaster. It is intended for use in the electrical, lighting, and body systems, specifically replacing faulty or worn headlight switches to restore proper headlight control.

  • Resolves intermittent or non-functioning headlights
  • Replaces switches with damaged or worn terminals
  • Fixes issues related to faulty headlight control circuits
  • Addresses problems with headlight dimmer or on/off functions
  • Eliminates loose or unreliable switch connections

Installation Notes and Tips

Installation of the DS-645 headlight switch requires removal of the existing switch from the dashboard or control panel. The direct snap fit design allows for a secure fit without additional fasteners. Ensure the vehicle's battery is disconnected before installation to prevent electrical shorts. Verify the six male blade terminals align correctly with the vehicle's wiring harness connector. After installation, test the headlight functions to confirm proper operation.

Quality Assurance and Warranty

Standard Ignition parts are manufactured to meet or exceed OEM specifications, ensuring reliable performance and durability. The DS-645 headlight switch undergoes quality control testing to verify electrical and mechanical functionality. While specific warranty details may vary, Standard Ignition typically offers coverage against defects in materials and workmanship, providing confidence in the product's longevity and reliability.

BrandStandard Ignition
Part NumberDS-645
Attachment MethodDirect, Snap Fit
Connector GenderNo Connector
Connector ShapeRectangular
FunctionsHeadlight
Terminal GenderMale
Terminal TypeBlade
Voltage12

This part fits 13 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
1993BuickRoadmasterN/AStraight Socket
1993ChevroletCapriceN/Aw/o Twilight Sentinel
1992BuickRoadmasterN/A
1992ChevroletCapriceN/Aw/o Twilight Sentinel
1992ChevroletCommercial Chassis4.3LV6N/Aw/ Auto. Lights On/Off Delay
1992ChevroletCommercial Chassis5.0LV8N/Aw/ Auto. Lights On/Off Delay
1992ChevroletCommercial Chassis5.7LV8N/Aw/ Auto. Lights On/Off Delay
1992OldsmobileCustom CruiserN/A
1991BuickRoadmasterN/A
1991ChevroletCapriceN/Aw/o Twilight Sentinel
1991ChevroletCommercial Chassis5.0LV8N/Aw/ Auto. Lights On/Off Delay
1991ChevroletCommercial Chassis5.7LV8N/Aw/ Auto. Lights On/Off Delay
1991OldsmobileCustom CruiserN/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:

104682811S464953-23007HL6608LS204S2106SW819

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