The Isuzu VehiCROSS front and rear turn signal bulbs both utilize a 1156 size bulb for proper operation. The replacement chart covers vehicle production spanning 1999 to 2001.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 1156 bulb is the sole bulb type across all turn signal positions in the Isuzu VehiCROSS specifications, covering both front and rear applications for the 1999-2001 model years.
The 1156 is a single-filament bulb, which means it serves one lighting function per socket rather than combining two functions such as braking and turn signaling into a single unit.
The 1156 operates at 12 volts and 21 watts, a power rating typical of incandescent automotive turn signal bulbs designed for standard vehicle electrical systems.
The 1156 uses a BA15s bayonet base, a single-contact bayonet mount with a 15mm collar. The "s" designation indicates a single contact pin, distinguishing it from the dual-contact BA15d base found on some other bulb types.
The 1156 carries ANSI standardization for the US and Canadian markets, meaning its physical and electrical characteristics conform to a defined industry specification rather than a proprietary standard.
Because the same bulb type is specified for both the front and rear turn signal positions in the Isuzu VehiCROSS, a single replacement bulb serves either location without substitution concerns between positions.
The 1156 is sometimes confused with the 1157, a visually similar bulb that uses a dual-contact BA15d base. The two are not interchangeable due to the difference in base contact configuration, and installing a 1157 in a socket designed for a 1156 is not possible without modification.