The Mitsubishi Van uses 1156 bulb size for both front and rear turn signal applications. This replacement chart covers 1987 to 1990 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.
The Mitsubishi Van uses the 1156 bulb for both its front and rear turn signals across the 1987-1990 model years.
The 1156 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized industry standard used across the United States and Canada.
The 1156 operates on a 12-volt electrical system and draws 21 watts, which is typical for incandescent automotive turn signal applications.
The 1156 is a single-filament bulb, meaning it serves one lighting function only, as opposed to dual-filament types that can handle two functions such as braking and signaling simultaneously.
The BA15s bayonet base on the 1156 features a single locating pin on the base collar, which distinguishes it from the BA15d base used on dual-filament variants such as the 1157.
Because the front and rear turn signal positions on the Mitsubishi Van share the same 1156 specification, a single bulb type services all four turn signal housings on the vehicle.
The BA15s bayonet mount is a twist-and-lock style base, where the bulb is inserted and rotated to secure it within the socket, rather than using a screw thread.
The 1156 and the visually similar 1157 are not interchangeable despite sharing the same BA15s-style housing appearance, as the 1157 uses a dual-pin BA15d base that physically differs from the single-pin BA15s socket required for the 1156.