How do I replace the rear stop light? - 2001 Hyundai Elantra

Did you check STOP LP fuse 15amp. in the rear fuse block ? Do you know where this is. Fuse Block - Rear Under the rear seat, on the left side of the floor pan.
The STOP LP fuse in the fuse block - rear supplies battery positive voltage to the normally open stop lamp switch. When the driver presses the brake pedal, the switch contacts close. The battery positive voltage flows to the left stop lamp assemblies, to the right stop lamp assemblies and to the center high mounted stop lamp (CHMSL). The left stop lamp and the CHMSL have ground at G402. The right stop lamp has ground at G401.
Did you check for power at the stop lamp switch ? both in an out of the switch with brake pedal pressed ?
Did

Hi, you need to test if the power is coming to the plug for rear brake light. If the power is not there that is your first problems. Also may have earth wire problem.

Replace climate modual

Sounds like you lost the ground to the rear lights.

the signal indicator lights are suppose to flash in perticular time interval which is connected to a timer relay when the light flashes faster that means the other light is not working and the relay is getting double the current and moving faster so check the other light either the bulb is fuse or the current is not reaching up to the bulb

Should have acsess to lightbulbs in trunk of car.

Open trunk and remove any carpet or cover around light area.

Bulb should be in a socket,turn socket until it comes out of light lens.

Yes you can do this your self. When you open the back hatch their should be a way to take out the whole back light system, which then you can replace each individual light.

brake light switch fault, above the brake pedal, may have two wires or four depending on variation of model, not expensive to replace.

Good luck Davelee

IF you have NO brake light in the rear and NO HIGH mount stop light. You may have a BAD Brake light switch this located at the top of the brake pedal under the dash. Replace switch and that should solve your problem. Good luck and thanks for using FIX YA