Mitsubishi Mighty Max Back Up Light Bulb Size

The Mitsubishi Mighty Max back up light utilizes 1156 and P21W bulb sizes according to the provided data. Information for the specified components covers the range from 1983 to 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
1983-1996	1156

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 21W.	1156

Other Locations

Additional Notes

The Mitsubishi Mighty Max uses the 1156 bulb for the back up light position across all listed model years, spanning 1983-1996.
The 1156 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 1156 operates on a 12-volt electrical system and draws 21 watts, which is consistent with standard automotive reverse lighting applications.
The 1156 is a single-filament bulb, meaning it serves only one lighting function, as opposed to dual-filament types that handle two functions such as braking and running light duties simultaneously.
The 1156 uses a BA15s bayonet base, where "BA15" refers to a 15mm bayonet cap and the "s" denotes a single-contact configuration at the base.
The BA15s single-contact base is not interchangeable with the BA15d base, which is a dual-contact variant used on different bulb types such as the 1157. Substituting one for the other is not possible without a socket adapter.
The consistent use of the 1156 across the entire 1983-1996 production span of the Mighty Max indicates no back up light socket changes were introduced during that period.