Plymouth Voyager Map Light Bulb Size

The Plymouth Voyager map light utilizes bulb sizes 578, PC579, 906, and 912 depending on the specific version of the vehicle. Available data for the lighting components covers the range from 1984 through 2000.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2000	578
1999	PC579
1996-1998	578
1993-1995	906
1987-1992	912
1984	912

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 41mm length, end-cap contacts. 12V, 12W.	578
ANSI standard (US & Canada). Festoon bulb with printed circuit board socket. 12V.	PC579
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906
ANSI standard (US & Canada). Wedge bulb (T15). Variant of 921. 12V, 12W.	912

Other Locations

Additional Notes

The Plymouth Voyager map light bulb specifications cover model years 1984 and 1987-2000, with four distinct bulb types used across that span: 578, PC579, 906, and 912.
The 912 bulb is the most frequently specified type in these records, serving the Plymouth Voyager across 1984 and 1987-1992. It is a T15 wedge bulb rated at 12V and 12W, and it is classified as a variant of the 921 bulb.
The 578 bulb is a festoon type with a 41mm length and end-cap contacts, rated at 12V and 12W. It is specified for the Voyager for model years 1996-1998 and 2000.
Both the 578 and 912 bulbs share a 12V, 12W rating, though they differ fundamentally in form factor. The 578 uses end-cap contacts in a festoon configuration, while the 912 uses a wedge-style base, making them physically non-interchangeable despite identical electrical ratings.
The 906 bulb is a T10 miniature wedge type rated at 12V and 8W, specified for model years 1993-1995. Its lower wattage distinguishes it from the 578 and 912 bulbs used in surrounding years.
The 1999 Plymouth Voyager is the sole model year in these specifications to use the PC579 bulb. While it shares the festoon form factor with the 578, it requires a printed circuit board socket, making it incompatible with standard festoon sockets used by the 578.
All four bulb types listed carry ANSI standardization applicable to both the United States and Canada, indicating conformance to a shared North American specification framework.
The transition from the 912 wedge bulb to the 906 wedge bulb between 1992 and 1993 represents a shift to a lower-wattage T10 form factor from the T15, and these two wedge types are not interchangeable due to differences in base size and wattage.