i just bought a 2003 Tiburon 2.0 5 speed.
my interior lights, turn signals, and tail lights do not work. blinkers dont even flash on the dash. only my headlights and brake lights work. ive done some searching but haven't found anything quite like this. anyone have a solution to my lighting problem?

 

No solution. Only a start.
Did you check the fuses in the engine bay and the passenger cabin?

 

Yes. I have checked all fuses, under hood and in cabin. No fuses are blown. Could it be the multi function switch? Since that controls all of the lights? Only my headlights high and low beams, and brake lights work

 

Turn signal, headlights and tail lights go through the multi function switch
The interior lights and brake lights do not

Does the horn work?
Does the car start and run?

Usually, if something stops working then we check for blown fuses
When the fuses are not the problem then we must check for powers and grounds.
Use a multi-meter to check for power at the interior lights when they should be powered up
If they are good then check the grounds
That should start you down the right way to diagnose the problem
Oh, a wiring diagram would also help.

 

Yes, car runs and drives. Horn works, brake lights work. just no interior lights, directionals, and tail lights. I'll check power and grounds tonight, and see where that leads me

 

If you can get a hold of the electrical diagram/schematics then you should be able to see which fuse leads to the relay that powers up the tail lights and interior lights.
The multi function switch provides a pathway to ground on the control side of that relay
If you can locate that relay then try swapping it with another one like it
Or if you know what you're doing then jump the circuit to test if the interior lights will come on.

Oh, on some models, there is a black thing in the cabin fuse box.
Got to make sure that it is in the right position and seated properly
Use a flash light to see clearly if you have it and if it is in correctly
It controls the power to the radio and interior lights and maybe one other thing.

Good luck to you