No...Sorry, i meant the headlights. When the factory head light is replaced with a LED headlight, there is nowhere for the park light bulb to be fitted. Most folks would pull the bulbs out and tuck the wires in behind to keep them out of the way. As the fitting is a "spade" type .....
... this is what allows the contacts to touch. It only needs the earth and live to touch and"pop"...the fuse is gone and so has your tail light as they run off the same fuse.