The Dodge Dynasty uses the 9004 bulb across all model years from 1988-1993 for both high beam and low beam headlight positions.
The 9004 is a dual-filament halogen bulb, meaning a single bulb unit contains two separate filaments that serve both the high beam and low beam functions within one housing.
The 9004 operates on a 12-volt electrical system and draws 65 watts on the high beam filament and 45 watts on the low beam filament.
The 9004 uses a P29t base, which is a specific connector type that is not interchangeable with other common base configurations such as those found on single-filament bulbs.
The 9004 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared across manufacturers.
Because the same 9004 bulb code applies to both the high beam and low beam positions across all listed years of the Dodge Dynasty, a single replacement bulb type services both headlight functions on the vehicle.