Having a rear turn signal light that is not working is a surefire way to be pulled over and ticketed by the police. Assuming that the turn signal lights are working on the other parts of the car, you can rule out something being wrong with the turn signal switch and go straight to repairing the defective light bulb. Turn signal lights can be purchased at most auto supply stores or on the Internet at auto supply online stores.
Determine the best way to access the rear turn signal light. It may be from the outside of the vehicle and you may need to unscrew the cover in order to access the bulb. Truck lights may be accessed after opening the tailgate of the vehicle. Other types of cars' lights may need to be accessed from within the trunk of the car. Look for screws in these places to determine where you will be able to remove the light.
Unscrew the cover using your screwdriver. Remove the cover from the vehicle.
Remove the light bulb by pulling it out of the socket. You may have to squeeze and twist it a little to get it to come out.
Replace the light bulb with the new bulb. Replace the light's cover.
Turn on your vehicle and your turn signal to test that the light is working. If it is still not working, you may have a different type of problem with the turn signal connection.
