What is the neutral safety switch on 1996 Oldsmobile cutlass cierra?

The neutral safety switch on a 1996 Oldsmobile Cutlass Ciera (and most other vehicles) is a safety device that prevents the engine from starting unless the automatic transmission is in Park or Neutral. It's a simple switch that's electrically connected to the ignition system. When the transmission lever is in Park or Neutral, the switch closes, completing the circuit and allowing the starter motor to engage. If the lever is in any other gear, the switch is open, preventing the engine from starting.

It's typically located on the transmission itself, near where the shift linkage connects. However, its exact location and appearance might vary slightly depending on the transmission type (e.g., 3-speed, 4-speed automatic). You'd likely find it by tracing the wiring harness from the ignition switch to the transmission. Accessing it often requires removing some parts, so consult a repair manual specific to your vehicle's year and model. A repair manual will give detailed diagrams and instructions.

A faulty neutral safety switch can lead to the engine not starting, or even starting in gear which is very dangerous.