1996 Mercury Sable Owner's Manual - Page 116

Low Fuel Light (If equipped) This light comes on when your fuel gauge indicates approximately 1/16 of a tank. The ignition must be turned to the ON position for this light to come on. This light will glow steadily. Low fuel light Rear Lamp Out Indicator (If equipped) This light indicates that a rear tail lamp or brakelamp is not functioning. It comes on momentarily when the ignition is turned to the START position, then goes out. This light will come on to show a rear tail lamp burnout when the light switch is turned to the parking lamp or headlamp position. This light will come on to show a brakelamp burnout only when the brake pedal is pressed. The light will stay on until the ignition is turned to the OFF position. Rear lamp out light NOTE: The warning light may not work or you may get a false reading if you use trailer lights or use improper replacement bulbs. 89