Separate the air intake pieces. They should come out easily. The light box is directly under this. Two round wire clips hold a plastic cover. If you remove the cover it's easier to get at the white plastic holder that requires a slight turn to remove. Be careful to seat this holder properly when installing. This job is not hard.
on what car
assuming you mean the light bulbs, see the answer to "how do you change turn signal lamps both front and rear on a 96 mercury grand marquis" right here in WikiAnswers.
the socket should just turn out in the back under the hood.
remove passenger side signal front light first then passenger headlight and horn should be right behind below the side passenger signal light!
More than likely you have a burnt out bulb at the front signal light, rear signal light, or brake light on the right side.
change the light bulb,
pivture to change right turn signal
If only the right rear brake/signal light is effected it is not the fuse. Inspect the right rear brake/signal bulb, socket and wiring.
To accesses the right turn signal light you have to open the hood and on the very to corner of the headlight housing you will see a small screw remove the screw and pull forward and the entire housing for the turn signal will come off change the damaged bulb .To install retrace those steps. You are done.........Mario
change the flasher
It has been my experience that a rapid turn signal indicates there is a burnt-out signal light bulb (either front or rear) on the side of the rapid blinking signal. If the right signal is blinking rapidly, the problem is in the signal lights for the right side (front or rear) of the vehicle. Turn the rapid signal on and step out of the vehicle to find which bulb is not lighting.
If it is a front flasher (a.k.a. signal lamp) there should be a way for it to pop out from the mounting bracket it is attached to. turn it either clockwise or counter clockwise and the signal should come right out. the light in the socket should be the same or you can pull it out. The rear signals require to removing of two screws; the entire casing for the light will come out. Then you treat it as a front signal and follow the same steps.