How to replace the license plate blub

what country? ( export below means , NOT USA)
its in the FSM
quote:
A single standard equipment rear license plate lamp unit is integral to the
license plate mounting bracket just below the left rear lamp unit on vehicles manufactured for domestic
markets. A bracket with two rear license plate lamps is located on the rear bumper directly below the
spare tire on vehicles manufactured for export markets.
and HOW TO: quote
1. Disconnect and isolate the battery negative cable.
2. Remove the license plate from the rear license plate bracket.
3. Remove the four screws (4) that secure the rear license plate bracket and lamp unit (3) to the four spring
nuts (2) in the rear body sheet metal (5).
4. Pull the bracket and lamp unit away from the rear body sheet metal far enough to access and disconnect
the body wire harness connector (1) from the connector on the back of the bracket and lamp unit housing.
5. Remove the bracket and lamp unit from the vehicle.
unquote the FSM.
Buy one for $20-

your going to remove the entire trunk lid assembly from the vehicle. If you open the trunk and look from the inside you should either see black plastic wing nuts or 10mm nuts holding the assembly to the trunk. There will be approximately 10 of them that will need to be removed. Once they are removed the lens assembly will pop away from the trunk lid. The license bulbs can then be replaced. I usually replace all six taillight/license bulbs whenever I have one of these apart. Its the same bulb for all six lights.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

1. Remove the screws that secure the license plate lamp assembly to the rear bumper fascia
2. Pull the license plate lamp assembly down and out through the mounting hole in the rear bumper fascia far enough to access and disconnect the wire harness connector.
3. Remove the license plate lamp assembly from the rear bumper fascia.

The fuse box should be located by your right leg near the bottom of the dashboard. There should be an access panel that un clips and allows you to access all the fuses for the interior and exterior lighting.

The fuse labeled REAR PARK LP 15A in the right instrument panel fuse box powers the rear park lamps, and the tag lamps. If your rear park lamps are working then you most likely need to replace the tag lamps (bulbs). Use the following procedure to replace the lamps.

To Remove:

1. Remove the two mounting screws from the license plate lamp.
2. Remove the license plate lamp from the rear bumper fascia.
3. Remove the license plate lamp socket by turning it counterclockwise.

To Install:

1. Install the license plate lamp socket by turning it clockwise.
2. Position the license plate lamp to the rear bumper fascia.
3. Install the license plate lamp mounting screws.

First look under when your license plate lights are and you will see 2 phllips headed screws remove those screws and the license plate light assembly will drop out of the bottom of the trunk, simply twist the blub to unlock it from the light housing pull the bulb straight out of the socket replace it with a new bulb and the installation is the reverse of the removal.

2002 HYUNDIA XL 350, LIC. PLATE BLUBS CAN NOT GET ASSEMBLY DOWN TO REPLACE BLUBS, DUE TO THE FACT THE WIRES ARE TOO SHORT TO PULL UNIT DOWN. ANYH IDEAS?

LICENSE PLATE LAMP BULB
REMOVAL

1. Remove screws attaching license plate lamp to rear bumper
2. Remove lamp from bumper.
3. Remove bulb socket from lamp.
4. Pull bulb from socket.

INSTALLATION

1. Install bulb into socket.
2. Install bulb socket into lamp.
3. Place lamp in position.
4. Install screws attaching license plate lamp to rear bumper.

this is straight out of the book ok

1. Open the rear compartment lid.
2. Remove the rear compartment lid trim.
3. Pull back on the rear compartment trim panel.
4. Unplug the lamp connector from the rear compartment lid wiring harness.
5. Press the grommet out of the rear compartment lid.
6. Remove the nuts retaining the lamp assembly to the rear compartment lid.
7. Remove the bulb.

first of all i would get a 12- volt tested and turn the lights on take the new blub out and then test the sockets and no power test the wires behind the sockets if you have power then the sockets are bad or burn out replace if needed.