My tail lights are not working on my 2000 jetta the front lights work the break lights work and the blinkers work all inside lights work just fine

The only thing that both the brake lights and tail lights use is a ground connection. Keep in mind the warning light on the dash may be for any exterior lamp. You may need to check the sockets and grounds on all four corners of the car.

The Bulbs Have 2 filliments in them if 1 is burnt out that would give you the fast not working tail light there may be an issue with the brake light switch located above the brake pedal on the arm.

If you put the tester on the outlets and it lights up properly but the bulbs dont, you have already concluded that the wiring isn't the problem. unless of course the wires are corroded and simply putting the bulb in shorts it out. Have you tested the bulbs?

i would suggest checking your fuses,

check for a bad ground wire for the tail lights. You are looking for a black ground wire near the bottom of the left rear corner of the car, inside. you may need to take the trim panel off to find it. if you take out the left tail light you should be able to follow the harness to where the black wires come out and a terminal is screwed to the body. turn on the hazard lights and when you get near the problem the lights will brighten and dim.

CHECK TAIL LIGHT BULBS.IF BULBS CHECK OUT GOOD PROBLEM COULD BE CORRODED BULB SOCKETS OR BROKEN LOOSE WIRE IN CIRCUIT.

Everything works, more or less, so you know that the switches and fuses are good. That means that you've got either bulb problems or power/ground problems. First, try swapping the bulbs around to see if the "bad" lights will work with the known "good" bulbs in them. If so, you just need to replace some bulbs. If not, check the sockets inside and out for corrosion, clean them (wire brush, steel wool, sandpaper, etc.) if necessary, and use a voltmeter or automotive tester to make sure that you have power and ground to each socket. The fast flash on the turn signal is just an indicator that a bulb is out.

Bill B

try replacing the tail lamp socket. it could be shorting out

check fuses with a tester. just because they look good can be missleading

check your fuses then if there fine replace some the lights becuse might be light shorting them out give me thumbs up this helps you out