If you mean the 3rd brake light, it has a couple of screws to be removed to get the cover off allowing access to the bulb. If you're talking about the multifunction (brake/signal/parking) lights, it's similar. You'll have to remove the whole lens assembly. Be careful with it, cause you don't want to damage that lens assembly, they're ridiculously expensive to replace.
The check engine light, on your Hyundai Elantra can be reset by removing the fuse. Keep the fuse out for 10 seconds and replace it to its slot.
My Hyundi elantra has the oil light on but it has oil in it. Is the oil pump broken
I am referring to stop light located at back window.
On my 2000 Hyundai Elantra, you can access the license plate lights from the outside. You use a flathead to pop out the right side of the light, twist the back end (where the wire comes out) and the part with the bulb comes out. Pull it out, slide the new bulb in, retwist it into its container and pop the light back in place. Repeat for other side. Cost me $3 for the bulbs and took me about 5 min to do.
airbag light is on dash
The trunk light fuse on a 2003 Hyundai Elantra is located in the fuse box in the interior of the vehicle. It is on the driver's side. Look for the fuse for the dome light if the trunk light is not noted.
overdrive shut off
No the check engine light will not come on
It should be under the dash on the drivers side.
no
which light bulb are you talking about?
take the two screws out. the back of the light is connected with a rubber plug un hooked it an pull off the light,twist the bulb out of the scoket. my advise replace all thre bulbs