The Merkur Scorpio high beam and low beam headlight bulbs both utilize a 9004 size. The replacement chart covers vehicle production spanning 1988 to 1989.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9004 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments that serve distinct functions. One filament operates at 65W for high beam output, and the other operates at 45W for low beam output.
The 9004 bulb uses a P29t base, which is a three-pin connector designed to ensure correct polarity and prevent incorrect installation. This base type is specific to the 9004 and is not interchangeable with single-filament base types.
The Merkur Scorpio uses the 9004 bulb for both the high beam and low beam headlight positions across the 1988-1989 model years, with a single bulb type serving both lighting functions per headlight assembly.
The 9004 operates on a 12V electrical system, which is standard for passenger vehicles of this type. The dual wattage ratings of 65W and 45W correspond to the high and low beam filaments respectively.
The 9004 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning its electrical and physical specifications conform to a defined industry standard rather than a proprietary format.
Because the 9004 handles both high and low beam functions within a single housing, the Scorpio's headlight assemblies for the 1988-1989 model years do not use separate bulbs for each beam mode.