The tail lights on a VW Golf may keep blowing if a short is present in the system. When wires become damaged, they will quickly overload a circuit and blow fuses and bulbs.
A short in the wiring.
you have a short somewhere on that circuit. you need to find it and repair it.
why does my turn signal light keep burning out and why is the sockets and plastic lens melted.
A short in the wiring (grounding out)
Short in the wiring or inside one of the plugs.
you could have a short between the two.
Faulty tail lights - causing a short.
short circuit on trailer light wiring
Try looking at your tail light socket if it is fried that will blow the fuse
Short in the wiring or the lamp holder for the tail light is corroded.
Dead short to ground in either: Parking light socket or wire to Tail light socket or wire to Dash panel lights Remove 1 bulb and/or socket at a time to try to determine which is bad
Short in the wiring, or the circuit is overloaded.