Ford F-150 HVAC Temperature Control Bulb Bulb Size

The Ford F-150 HVAC Temperature Control Bulb uses a 161 bulb size for the specific lighting component located within the interior dashboard assembly. Data for the specified bulb size covers the span from 1975 to 1979.

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
1975-1979	161

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 1W.	161

Other Locations

Additional Notes

The Ford F-150 HVAC temperature control uses the 161 bulb across the 1975-1979 model years.
The 161 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 161 bulb follows the T10 miniature wedge form factor, a designation that describes the shape and size of the glass envelope as well as the wedge-style base, which requires no separate metal socket pins.
The wedge base design means the bulb is held in place by the tension of the socket itself rather than by a bayonet or screw mechanism.
The 161 operates at 12 volts, consistent with the standard electrical system voltage found in conventional passenger vehicles and light trucks of that era.
At a rated power of 1 watt, the 161 is a low-output bulb suited for illuminating small indicator or control panel areas rather than providing primary lighting.
Because the 161 is an ANSI-standardized type, bulbs carrying that designation from different manufacturers are expected to share the same electrical and physical characteristics.