If you're talking about a Focus, there is a panel in the trunk area.
change it from the inside
You change them from the INSIDE.
To replace a turn signal switch in a 1993 Chevy Lumina go to the trunk of the vehicle and find the plastic covering for the turn signal. Remove the cover and replace the bulb.
The front turn signal on a 1996 Blazer is accessed by using a Philips head screwdriver to remove the wheel well cover . Locate the bulb and twist to the left, remove. Replace with new bulb and replace the wheel cover.
By popping the light cover off and then figure out in your owners manuel how to remove the the bulb.
How do you remove the brake light cover on a ford focus
If its the front turn signal you open your hood and partly remove the black plastic cover on top of your headlights. Then you should see a screw on that screws on your signal light. Remove the screw and take off the the signal light and then remove the bulb.
Remove the bulb from the back side. The lense does not have to be removed.
Remove the exterior side mirror turn signal cover. You can remove the cover by prying outward on the retaining clips. Take hold of the lightbulb, push in and turn at the same time to remove. Reverse the process to install the new lightbulb.
In order to remove the turn signal from your 2003 GMC Sonoma, you would need to remove the lower dash cover and also the steering column cover. I have included a video below in the related links section that will show you exactly how to fix this.
From the inside.