Jeep Scrambler front turn signal bulbs utilize 1157NA, 1034NA, or 1157 sizes, while rear turn signal bulbs require 1157 size bulbs. The replacement chart covers 1981 through 1985 production years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
All three bulb types specified for the Jeep Scrambler's turn signals, the 1157NA, 1034NA, and 1157, share the BAY15d bayonet base and operate at 12V with a dual-filament configuration rated at 21W and 5W.
The BAY15d base is a double-contact bayonet fitting where the two contact pins are offset at different heights, a design that prevents incorrect insertion and supports the separate high- and low-wattage filaments used for turn and parking functions.
The 1034NA is described as a variant of the 1157, sharing the same base type, voltage, and wattage ratings, though the two carry distinct ANSI designations and are not listed interchangeably across all positions.
The "NA" suffix on the 1157NA and 1034NA denotes natural amber glass, meaning the amber color is built into the bulb envelope itself rather than produced by a colored lens or coating.
The Jeep Scrambler's rear turn signal position uses the 1157 across all model years from 1981-1985, indicating no variation in that position throughout the vehicle's production run.
The front turn signal position shows a bulb change between the 1981 model year, which uses the 1157, and the 1982-1983 model years, which use the 1034NA, followed by another change to the 1157NA for 1984-1985.
Because the front turn signal position uses three distinct bulb types across the 1981-1985 production span, year-specific fitment is a relevant factor when sourcing a replacement for that position on the Jeep Scrambler.
All bulbs listed are classified under the ANSI standard applicable to the US and Canada, which defines the physical and electrical parameters that manufacturers must meet for a bulb to carry a given designation.