99vw jetta fuse keeps popin.help.

Replace fuse. If fuse blows again it could be the ballasts have gone bad .

Could have a short in the system. The headlight could have blown again I don't think the radio is connect with headlight problem.

Both your low beam and your high beam is protected by the same fuse, so it makes sense that the fuse is OK if the high beam is working on the passenger side. There are 3 fuses for the headlamps. Fuse #13 in the Battery Junction Box (20 Amp). If this fuse is blown, the headlamp relay will not have any power and neither high nor low beam on either side will work (you will have no headlamps at all) Then there is Fuses #2 and #3 (15 Amp) in the Battery Junction Box. #2 goes to the left low and high beam and #3 goes to the right low and high beam.
The headlamp switch uses a SINGLE CIRCUIT to control BOTH sides at the same time, so if one side works, the switch cannot be the problem. The headlamp relay provides power for fuses #2 and #3 and we already ascertained that these fuses must have power since we have working lights on both sides, so the relay cannot be the problem. A replacement bulb has already been tried, so that pretty much leaves us with a bad lamp socket. (Most likely cause) or a bad connection at splice #S122, which is located in the main wiring harness near the breakout for the left headlamp. (RED/BLACK wire)

have you checked the fuse for the head lights? it only has one bulb for both low and high beams, so it could be the low beam fuse that went out, and if not replace the light bulbs, but make sure you check the fuses first.. good luck!

Have you tried High Beam and Low Beam? Your headlamps are powered by a self-resetting circuit breaker located in the Component Center which is located under the right side of the dash. (see picture) It is not likely that the circuit breaker has failed.(although possible)
If neither the high beams or low beams work, you probably have a bad Headlamp Switch or a bad Dimmer Switch. If one works and the other doesn't, I would check the bulbs first. If the bulbs are good, then you still may have a bad switch. Also check all your ground wires near the headlamps.

This is not really a solution, but more like a thought.. If the wiring is bad.. you'd be more likely to be shorting out, blowing fuses.. Have you checked the voltage regulator? If it's spiking from time to time, could blow head lights, without necessarily blowing other things. Have you checked the headlight mounts. Vibration could cause them to go out offten. You did not say how often they blow ! Or if they go together or one at time. [One thing I noticed with high performance bulbs, they seem to last almost exactly one year. (Give or take a month )]

1. Check that headlamp switch (11654) is in the off position.
   
2. Lift hood (16612).
   
3. Release latch and swing filler panel to left or right.
   
4. Remove electrical connector from headlamp bulb by grasping wires firmly and snapping connector rearward.
   
5. Remove headlamp bulb retainer (13N019) by rotating counterclockwise (when viewed from rear) about one-eighth turn and sliding ring off plastic base. Keep headlamp bulb retainer as it may be used again to retain new headlamp bulb.
   
6. Carefully remove headlamp bulb from socket by gently pulling straight backward out of socket. Do not rotate headlamp bulb during removal.

Headlamp Assembly, Explorer
Removal and Installation

1. Disconnect battery negative cable.
   
2. Remove blind rivets (2) attaching screws (4) and radiator upper sight shield.
   
3. Remove turn/park lamp attaching screws (2) and pull assembly away from body. Remove bulb sockets from housing and remove lamp assembly. Repeat on opposite side of vehicle.
   
4. With turn/park lamp assembly removed, screw attaching grille to front fender flange is accessible. Remove grille attaching screw. Repeat on opposite side of vehicle.
   
5. Remove attaching screws (4) located across top of grille.
   
6. Grip lower edge of grille and pull outward to disengage from retaining clips. Remove grille.
   
7. Using needle-nose pliers, compress barbs on headlamp housing retainer. With barbs compressed, pull forward on housing just enough to disengage from retainer. Repeat on opposite side of headlamp housing.
   
8. Turn headlamp housing as necessary and pull forward to disengage from headlamp aiming ball socket.
   
9. Disconnect wiring from headlamp bulb socket.
   
10. If replacing headlamp housing, remove retaining collar and bulb.
    

For installation, follow removal procedures in reverse order. Make sure to check headlamp aim.

Unplug the bulb and try the fuse again. If the fuse doesn't blow, replace the bulb.

probably need headlight bulb too, check fuses first.

I have a 2006 Suzuki Forenza with the same exact error, I had to replace fuse box. Now it is working, but it costed me almost $ 500.