What does the low coolant light look like on a 1999 Ford Mustang GT?

The low coolant light on a 1999 Ford Mustang GT is typically a small icon depicting a thermometer with a drop of liquid next to it, or sometimes just the thermometer itself with a low reading. It's usually located on the instrument cluster, among other warning lights. The exact appearance might vary slightly depending on the specific trim level, but it will be clearly marked or shown in your owner's manual. If you don't have the manual, you could search online for "1999 Ford Mustang GT instrument cluster" to find an image.