Where is the backup light switch for the reverse light located on a 1990 Nissan 240sx?

The backup light switch for the reverse lights on a 1990 Nissan 240SX is typically located on the transmission. It is mounted on the side of the transmission case, near the reverse gear. To access it, you may need to lift the vehicle and remove any obstructing components. Checking the vehicle's service manual can provide specific details on its exact position.