Ford Tempo high and low beam headlight bulbs utilize 9004 or H6054 size specifications. The replacement chart covers vehicle production spanning 1984 to 1994.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford Tempo uses the 9004 bulb for both high and low beam headlights across the 1986-1994 model years. The H6054 sealed beam unit serves the same functions in the 1984-1985 model years.
The 9004 is a dual-filament halogen bulb, meaning a single bulb contains two separate filaments to handle both high and low beam functions. It operates at 12 volts with a wattage rating of 65W for high beam and 45W for low beam, and it uses a P29t base.
The H6054 is a 5x7-inch rectangular sealed beam unit conforming to ANSI standards recognized in the US and Canada. Unlike a conventional replaceable bulb, the entire sealed beam assembly is replaced as one unit when it fails.
Because the 9004 and H6054 are fundamentally different in construction, one being a replaceable halogen bulb and the other a sealed beam assembly, the two types are not interchangeable across model years.
Both the 9004 and H6054 conform to ANSI standards applicable in the US and Canada, placing them within a standardized sizing and performance framework shared across many North American vehicle applications.
The P29t base on the 9004 bulb is a specific connector type that determines physical fitment into the headlight housing. A bulb with a different base type would not seat correctly even if its voltage and wattage ratings were otherwise compatible.