How do you replace the headlight bulb located on a 2000 Ford Focus SE?

All of the Focus model lights are identical. I recently installed Sylvania Cool Blue's on my '01 ZX3. Pop the hood. At the front of the car, look to the back of the headlight assembly. There will be a plastic cover on the back. On some models, you need to unscrew the plastic cap; on others, it just pops or screws off. There is a small retaining clip that surrounds and holds the bulb in place. Removing the clip can be tricky. On my Focus Wagon, there is a special place to push and release the clip that is above the bulb - perhaps further above than you might think. Gently push this aside with your hand and the bulb assembly will come right out. Just remove the original bulb and pop the new one in. These bulbs have a standard three-prong setup so there's only one way to install the new bulb. Pop the assembly back in place, attach the retaining clip and put the plastic cover back on. On the driver's side, you may want to remove the battery cover to give yourself a little extra room to work. No tools. 10 minutes.