The Sterling 825 uses 1156 bulb size for both front and rear turn signal applications. The replacement chart covers 1987 to 1988 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 1156 is the sole bulb type specified for the Sterling 825 across all listed turn signal positions and model years.
The 1156 bulb follows the ANSI standard, meaning it conforms to a defined set of electrical and physical specifications recognized across the United States and Canada.
As a single-filament bulb, the 1156 serves one lighting function per socket, which is consistent with its use in dedicated turn signal applications rather than combined stop/tail functions.
The 1156 uses a BA15s bayonet base, a single-contact fitting where the bulb is inserted and rotated to lock into place within the socket.
The 1156 operates at 12 volts and draws 21 watts, placing it in the standard range for automotive turn signal applications.
The Sterling 825 uses the same 1156 bulb for both the front and rear turn signals across the 1987-1988 model years, indicating a uniform socket type throughout the vehicle's turn signal circuit.
The BA15s base designation is not interchangeable with the BA15d base, which features two contact pins offset at different heights. Substituting a BA15d bulb in a BA15s socket is not possible without modification.
The 1156 is sometimes referenced alongside the 7506, which shares the same base and wattage but is built to ECE rather than ANSI standards. These two types are physically similar but are rated under different testing protocols.