One problem related to wiring has been reported for the 1998 Volkswagen Jetta. The most recently reported issues are listed below.
The e brake light, and the airbag light stay on once the car is started. Today this problem has included the heater fan not working, the headlights will not come on, and the wipers will not work. If I leave the light switch on, and leave the wiper switch on, I have found I can pull the high beam switch, and the wipers come on.