Ford Aerostar Radio Display Bulb Size

The Ford Aerostar radio display utilizes bulb size 37 and bulb size 1893 for illumination purposes. Available data for 1893 and 37 covers the period from 1986 through 1996.

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
1994-1996	37
1989	37
1986-1987	1893

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1W.	37
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 2W.	1893

Other Locations

Additional Notes

The Ford Aerostar radio display uses two distinct bulb sizes across its production years: the type 37 and the type 1893, both of which are ANSI-standardized miniature wedge bulbs of the T5 form factor rated at 12 volts.
The type 37 bulb is rated at 1 watt, while the type 1893 draws 2 watts. Although both share the same T5 wedge form factor and 12-volt operating voltage, the wattage difference means the two types are not interchangeable.
The 1994-1996 Ford Aerostar radio display uses the type 37 bulb. The 1989 model year also specifies the type 37, making it the more widely used of the two bulb types across the Aerostar's listed model years.
The 1986-1987 Ford Aerostar radio display uses the type 1893 bulb, which operates at the same 12-volt supply but at twice the wattage of the type 37.
The T5 designation refers to a tubular bulb with a width of 5/8 inch, a form factor common in low-wattage automotive instrument and display lighting applications.
The wedge base construction on both bulb types means the base itself acts as the electrical contact, with no separate metal bayonet or screw fitting involved.