Standard Ignition DS-401 Headlight Dimmer Switch

Headlight Dimmer Switch for GM Column-Mount Applications

The Standard Ignition DS-401 headlight dimmer switch is built for 12-volt systems and mounts on the steering column with a bolt-on attachment. It is a direct-fit electrical switch for select Oldsmobile and Pontiac vehicles, including 1995-1999 Oldsmobile 88, 1996-1999 Pontiac Bonneville, 1997-1998 Oldsmobile Regency, and 1996 Oldsmobile 98.

Key Features

• Headlight dimmer switch for column-mounted applications
• Bolt-on attachment method for secure installation
• Female connector with 4 terminals and 4 blade terminals
• 12-volt electrical design
• Copper alloy conductors for strong electrical conductivity and reduced resistance
• 100% tested for mechanical and electrical switching performance
• Standard Ignition DS-401 replacement part number

Detailed Description

The DS-401 is a headlight dimmer switch engineered for reliable beam selection in vehicles that use a steering-column-mounted switch assembly. Standard Ignition uses robust materials and copper alloy conductors to support consistent current flow and dependable switching action. This part cross-references Four Seasons 36952 for the same application. The Standard Ignition DS-401 is a practical replacement for drivers searching for a headlight dimmer switch for 1995-1999 Oldsmobile 88, 1996-1999 Pontiac Bonneville, or other listed GM applications.

What It Helps Fix

• Headlights that will not switch between high and low beam
• Intermittent beam selection from the column switch
• Electrical switching faults caused by worn internal contacts
• Dimmer switch operation problems in the steering column
• Loss of reliable headlight control in select Oldsmobile and Pontiac models

Installation Notes and Tips

Verify connector style, terminal count, and column mounting before installation. This part uses a female connector, 4 blade terminals, and a bolt-on mounting method. Confirm vehicle fitment by year, make, and model before replacing the existing switch. For best results, inspect the surrounding column wiring and connector condition during service.

Quality Assurance

Standard Ignition states that this switch is built with durable materials and tested for both mechanical and electrical performance. The DS-401 is manufactured to meet the demands of professional service work and to provide dependable switching in 12-volt headlight circuits.