My warning sound does not happen anymore when I leave my headlights on.. is that a fuse?

Some body in the workshop may have switched the theft deterrent system from active to passive mode during the scanning process.
The theft deterrent system has two arming modes;
Active and Passive. Active arming mode allows the
theft deterrent system to activate normally. Passive
arming mode is used for the servicing. The
intelligent tester allows the theft deterrent system to
switch between Active and Passive.
If the problem persists contact other qualified personnel.

Pull on the fusible links at the starter solenoid on the inner fender,one may be corroded or blown.

The owners manual should help shed some light on this problem. The car may be somewhat programable for the alerts and warning systems. You may also need to lubricate the door button that senses the door is open and closed. Good luck.

check the radio fuse

yes- could be one or more fuses- either a acc or courtesy fuse or could be and int(intermintent)fuse- check all and replace with the right fuse size

I would check your door pins and make sure they are not sticking or rusted for some reason. If the door pins do not pop out when the door is opened your computer will not sense your door being open and will not set off the warning chimes. Do your dome lights work at this time? If they do it is not the fuse at fault for your warning chimes not coming on.

do you still have dash lights? do the light doors close when this happens?

The sensor is in the door panel itself. The only fix I've found is to dismantle the door to replace the circuit board/sensor contained near the outside door handle. My 02 Jetta hasn't dinges for a few years now.

Sounds like the the parking light fuse blew.Under the dash there is a fuse block.you will see fuses there and remove the fuse to see if blown.If so replace with same type fuse.Anymore questions will be glad to help you...

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_a3369546f8067589

Had the same problem on a 2003 vibe- finally dianosed as a fried headlamp module then needing to trace back and find a short in the electrical that blew headlamp module . Module $ 170. Labor to replace module 2hrs. Labor to trace short 4 hrs??? Dealer charged me $900- .
If anyone has info on how much time it should have taken. I would appreciate the feedback