Open up the hood, and go in behind the fixture where the light is located. Sometimes there is an access panel on top. Open it and reach down inside and grab the bulb's socket. Twist the socket a quarter turn counter clockwise, and pull out the socket. Grab the bulb, and pull it straight out. To replace the new bulb, never touch it with your bare fingers, as this will greatly shorten the bulb's life, if it even work's at all. Use a tissue or something else in that order to handle the new bulb. Push the new bulb into the socket, put the socket back into the housing, and twist a quarter turn clockwise to secure the socket into the fixture
If the lightbulb itself is burnt out on a 1991 Mercury Cougar then just replace the light. If it is the wiring that is the problem then find the burnt wires and cut them. Replace them with new wiring.
You don't. The switch is all one , you will have to replace the entire switch.
I was looking at the 1999 Mercury Cougar Owner Guide and it does not show that it has a gas cap warning light
On a 2000 Mercury Cougar : That's your Anti-theft system status light
You need an oil change.
You are low on coolant.
it is located on the light a switch that says 12sec on and off
its below freezing temperature
How do I replace the fog lights in my 03 mercury mountaineer
Replace the flickering light.
The radiator fluid is low or you parked the car at am angle.