The Mack LE front and rear turn signal bulbs both utilize a 1157 bulb size for this vehicle model. The replacement chart covers 1995 to 1997 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 1157 is the sole bulb type across all turn signal positions in the Mack LE specifications, covering both front and rear applications for the 1995-1997 model years.
The 1157 is a dual-filament bulb, meaning it contains two separate filaments within a single envelope, allowing it to serve two distinct lighting functions at different wattages.
The 1157 operates on a 12-volt electrical system and draws 21 watts on its primary filament and 5 watts on its secondary filament, reflecting its dual-function design.
The 1157 uses a BAY15d bayonet base, a two-pin offset base type where the two pins are positioned at different heights to ensure correct orientation during installation.
The 1157 conforms to ANSI standards and is recognized in both the United States and Canada, indicating a standardized specification shared across North American automotive applications.
Because the Mack LE (1995-1997) uses the same 1157 bulb in both the front and rear turn signal positions, the bulb is interchangeable between those two locations on the vehicle.