The Big Dog Ridgeback high beam and low beam headlight bulbs both utilize a 9003 size. The replacement chart covers 2010 to 2011 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 is the sole bulb type across all listed positions and years for the Big Dog Ridgeback, covering both high beam and low beam headlight functions for 2010-2011.
The 9003 is a dual-filament halogen bulb, meaning a single physical unit contains separate filaments for high and low beam operation rather than requiring two distinct bulbs per housing.
The 9003 operates at 12 volts and carries a wattage rating of 60W on the high beam filament and 55W on the low beam filament.
The 9003 uses a P43t base, which is a bayonet-style fitting with a 43mm flange width, and fitment is contingent on this base type matching the socket in the housing.
The 9003 designation follows ANSI standards as applied in the United States and Canada, and bulbs sold under this designation conform to those regional specifications.
The 9003 and H4 bulbs share the same physical base and filament configuration, though they are defined under different standards bodies; this interchangeability is a known characteristic of the type rather than a specification stated for the Ridgeback specifically.