Well my 2003 hyundai tiburon got a problem, one day, the electronic door lock did'nt work, at the same time the signal lights and and the ones on the dash didn't work either, the intermitent also didn't work, the power window just got unstable either but i have already a mechanical have fixed this one....

It happens a lot for the Tiburon apparently....what you have to do is put the key in the ignition whilst the horn is going nuts, turn the key to the "on" position and wait a minute or so for the horn to stop blowing. Then press the "unlock" button on the fob until you see the turn signals flash. try turning the key over and see if it will start up. If it doesn't, try again, same thing only turn the key all the way off and try starting as normal again. I can't remember if it's the "unlock" or "lock" button you're supposed to press, but one of them does it. Test it while in the car and see if it locks when you hit lock on the fob.....oh, and also make sure all the doors are shut while you are doing this. It recalibrates the fob to the car's computer and resets your security system and keyless entry.

you have a blown cabin fuse check each fuse and replace with fuse of coisponding ampage

replace both door lock actuators to fix problem.

Go to www.hmaservice.com and register( Vehicle by VIN). Afterward, you have access to shop manuals, service bulletins, wiring diagrams, etc. about your vehicle.Take/Tow your vehicle to an authorized Hyundai dealership and pay the diagnostic fee... they will tell you exactly what the problem is and the cost of parts/labor to fix it... at least this way you'll know what the problem is and what's required to fix it.

One of the door 'LOCK/UNLOCK' actuators is losing it's 'GROUND' connection/'circuit. This happens when the key is in the ignition and the ETACS (Electronic Time Alarm & Control System) is looking for the appropiate signal(s) to LOCK/UNLOCK the doors. The best solution: Take/tow the vehicle into a Hyundai Service Center (dealership), pay the diagnostic fee. They will tell you EXACTLY what the problem is and what's needed to fix it (parts, labor, tax, time-frame, etc.).

check for obvious damage to connectors or wires. what happens most of the time is the plastic motor gear on motor splits. be careful when removing motor to not let the regulator spool go free.

The tiburon turn signals are controlled by a bcm (body control module) The bcm controls the ground to the signals. These always go bad and cause the signal to stick on or just not work. hope i was a help.

i had the same problem, well my right turb signal stayed on all the time and i had to pull the fuse. the BCM under your dash is bad. the BCM is where all your fuses are plugged into. you can find one online for about $700ish. go to hyundaihouseofpower.com or newtiburon.com and they might help you. 03 tiburons have bad luck when it comes to the BCM. change it out and your problems will be solved.also look on ebay.

I just found out today that it is a problem for alot of 2003 tiburons that the flasher relay for the turn signals will go out causing the turn signal lights to stay on even with the car off. The relays are internal and located on the circuit board of the BCM. In order to fix you will have to remove and disassemble the bcm circuit board from it's housing and resolder a new flasher relay. Haven't figured out where to get that flasher relay though.

I had both doors with the same problem. I replaced the actuators and everything works perfect now.