Oldsmobile Cutlass Salon Dome Light Bulb Size

Additional Notes

• The festoon-type bulb is the most prevalent dome light specification across the Oldsmobile Cutlass Salon model years covered, with three distinct festoon designations appearing in the data: the 561, the 562, and the 211-2.
• The 561 and 562 are both 44mm festoon bulbs operating at 12V and 12W with end-cap contacts, making them physically and electrically identical in their core specifications.
• Despite sharing the same physical length, voltage, and wattage, the 561 and 562 carry different ANSI designations, which indicates they are not officially interchangeable even though their measured characteristics align.
• The 211-2 festoon bulb used in the 1978-1979 Cutlass Salon is slightly shorter at 41mm and uses an SV8.5 base rather than end-cap contacts, distinguishing it physically from the 561 and 562 despite sharing the same 12V, 12W rating.
• The 1987 Oldsmobile Cutlass Salon dome light specification shifts entirely away from the festoon format, calling for the 1004 bulb, which is a dual-filament BAY15d bayonet-base type rated at 12V and 21/5W.
• The 1004 bulb is noted as a variant of the 1157, a widely used automotive bulb, though the dual-filament design and bayonet base make it a distinct fitment from any of the festoon types used in earlier model years.
• The wattage of the 1004 bulb at its higher filament draw (21W) is notably greater than the 12W rating of the festoon bulbs used across the other model years, reflecting a different electrical load on the dome light circuit for the 1987 model.
• All bulb designations listed across the Cutlass Salon dome light specifications conform to ANSI standards recognized in both the United States and Canada.