How do I change my front turn signal? I can access the lower signal from under the bumper, I can't access the signal that is next to the headlight. There are no screws in front to take the plate off, and I can't get to it through the engine compartment.

It all depends on the vehicle. Many newer cars you have to remove the front bumper cover to get to the lights.

I have recently replaced the front bumper on my 2005 Aveo, after hitting a deer. The good thing to know, is directly connected to the bumper, there is NO sensor to worry about tripping the airbags. There are what seems like a million Teflon screws, that must come out to remove, and replace the bumper. The turn signals, and fog lights(if equipped) must come out first. All electrical connections, like the headlights, turn signals, and fog lights, must be disconnected, or you can't access the bolts, and screws near them. It's actually very easy to remove and install the bumper after the electrical connections are dealt with. Do not worry about the plastic clips located under the hood for removal. They are cheap and easy to replace. Here are some pics that might help you.
Front bumper front and back.

Teflon screws.

Yes, the bumper has to come off to remove the headlights.
There will be a number of smaller screws around the outside of the bumper, like in the wheel well and under the car by the splash shield under the engine. All of those will need to be removed. Then you need to remove the turn signal lights in the front bumper with a long phillips screwdriver. Take a flashlight and look inside the bumper through the lower grill at the side of the turn signal housing. You'll see a small hole for the screwdriver. The screw doesn't need to come all the way out to remove the light.
Remove turn signal housing on both sides and look back at the frame crossmember behind the bumper. There are two large bolts on each side holding the bumper on. You'll need some extensions to reach them. Once those are out, you'll be able to tell if you missed any smaller screws/clips. Carefully move the bumper cover out of the way to have access to the headlight mounting points.

All front light bulbs should be accessible, you will need to remove the 2 headlight bulbs...be sure to match the amber color if your Ciera still has the original bulbs:) The side marker light bulbs are reachable and can be changed by removing the 1 hold down bolt too...:)

I just did this.
Remove the fender liner
Remove the mud guard

There are several 6mm flange bolts with 10mm heads.
3 along the inside of the hood
1 behind the top of the door accessible with the door open
2 on the bottom of the door behind the mud guard
2 behind the bumper cover, the headlight is attached to one of these.
There is a screw holding the end of the bumper to the fender. Remove it and pull the cover away from the fender. There is a large plastic clip inserted into the fender next to the two bolts that holds the bumper cover but should release when you pull the cover.

The headlight has two dowel pins that insert into the fender, removing the headlight may be better but you have to remove the bumper to get to some of the headlight assembly bolts. There are 4 bolts holding on the bumper that are accessible through the turn signal holes. The bumper will "fall" about an inch and sit on some collar bolts so it can be lifted off without one side falling (a neat feature). The turn signal is held by one Phillips screw accessible through a special hole on the inboard side of the bumper with your longest Phillips screwdriver.

This video will show you how to change the headlight in your Accord.">

look at the other side,under the bumper you just twist and turn and you will have access to change your bulb.

Headlights Removal & Installation WARNING
Halogen bulbs contain a gas under pressure. Handling a bulb improperly could cause it to shatter into flying glass fragments.
To help avoid personal injury:

• Turn off the headlamp switch and allow the bulb to cool before changing bulbs. Leave the headlamp switch off until the bulb change is complete.
• Always wear eye protection when changing a halogen bulb.
• Handle the bulb only by its base. Avoid touching the glass.
• Do not drop or scratch the bulb. Keep moisture away.
• Place the used bulb in the new bulb's carton and dispose of it properly. Keep halogen bulbs out of the reach of children

To Remove:

1. Before servicing the vehicle, refer to the precautions in the beginning of this section.
2. Remove or disconnect the following:
   • LH and RH engine under covers
   • RH and LH Front fender liners
   • Front bumper cover
3. 2 bolts and disconnect the connectors
4. Headlight assembly by pulling it forward
5. To Install:
   
   1. Install or connect the following:
      • Headlamp assembly
      • 2 bolts and connector
      • Front bumper cover
      • LH and RH front fender liners
      • LH and RH engine under cover

Its not that hard but you have to remove bumper to get to the two bottom bolts that holds the headlights. First remove grille and there are 2 10mm bolts that holt the tip of fenders they are the first bolts under the fender weld closes to the bumper cover. Then there are two bumper mounts/brackets that hold bumper to frame/radiator support. they are held by (4) 12mm bolts may need a swivel socket to get to them( easily accessed if you remove front signal lights in the bumper held by philips screws in the corners).After removing bracket bumper should come right off. Headlights are in plain clear view. (4) 10mm bolts and you are done. Re-install in the reverse. Good Luck . If I fixed ya leave me a FIX-YA comment. Contact me if you need more info

Depending on the year you have to remove the grille to gain access to the mounting bolts under the grille, as well as the lower air vents in the lower valence to gain access to those mounting bolts. Remove the screws from the fender well liner to the bumper and pull the front bumper off to gain access to the lower mounting bolts for the headlight assembly.