warning light on my dashboard

Hello, without more detail it will be hard to be certain of the answer. However, there are only a few lights on the dash of these old cars.

If the warning light is orange and has a circle in the middle with dashed lines around it that is your front brake pad wear sensor. It most likely means that your front brake pads are worn and need to be serviced soon, perhaps along with other brake parts.

If the light is orange or red and says BRAKE that either means the car thinks your parking brake is still set, or it means you are low on brake fluid.