Jeep Grand Wagoneer Back Up Light Bulb Size

Additional Notes

• The 1156 is the sole back up light bulb size listed across all model years of the Jeep Grand Wagoneer covered by these specifications.
• The 1156 is an ANSI-standardized bulb type, meaning its physical and electrical characteristics conform to a defined North American standard recognized in both the United States and Canada.
• The 1156 operates on a 12-volt electrical system and draws 21 watts, which is typical for incandescent automotive reverse lighting applications.
• The bulb uses a BA15s bayonet base, a single-contact fitting where the "s" denotes a single pin, distinguishing it from double-contact bayonet variants that are not interchangeable with it.
• The 1156 is a single-filament bulb, meaning it serves one lighting function only, as opposed to dual-filament types that handle two functions such as braking and running light simultaneously.
• The BA15s base type is a widely produced standard, and the 1156 is available from numerous manufacturers, though substitutions using double-contact BA15d bases would represent an incompatible fitment.
• The Grand Wagoneer model years covered in these specifications span 1984-1993, with the 1156 bulb size remaining consistent across that entire period, including a gap where 1992 is not represented.