Mine (code) was under the spare tire in the trunk, but also a 97, I believe. Worth looking though!
No, not without modifications.
The radio amp on a 99 VW Jetta is located under the driver side dash. It is in the fuse number 42 slot.
To enter the radio code for a 2003 VW Jetta, first turn on the ignition and then the radio. The display will show "SAFE" or "LOCK." Use the preset buttons (1-4) to input the code, pressing the corresponding button for each digit. After entering the full code, press the "MODE" or "OK" button to confirm and unlock the radio.
Take your car to the vw dealership and they will give will put the code into your radio, however they will most likely charge you $100 dollars for getting the code for you and putting it in the radio. I see about 3-4 cars a day come in for radio codes so once you get that code keep it in a safe place you might need it again. On my 1996 VW Jetta you must hold down the right seek or scan button until the display blanks out. Then you can enter the unlock code.
for 98 gt, 185 60r14
http://www.modifiedlife.com/stereo-radio-wiring-diagram-1997-volkswagen-jetta/
To unlock the radio, there are many different codes. I just put a 2008 radio in my 2006 VW Jetta. Had to call the dealer to get the code. They need your VIN from the current car and the Serial number off the radio. My code was 0185, try that.
I have the code just need how to program
frame rail on right rear of car
Your local dealer has to pull the radio and hook it to a computer to find the code. It cannot be done with the radio in the vehicle.
I just had this same problem with my 1998 VW Jetta. My parking brake light came on one day, but only half illuminated. Shortly after my windshield wipers and headlights stopped working. My radio works but the fans don't work either. I just found a thread which seems to point the problem at the ignition switch: http://car.justanswer.com/volkswagen/6uht-1998-volkswagen-jetta-headlights
why steam come out from the air conditioner exit , in a vw Jetta 1998 when engine gets hot