Same here, if you take the light out and turn it with glass to the bottom, you will see pieces of insulation.... Recall will work with original owners and in Europe or NAm. I am buying aftermarket lights (probably China) and replacing them....HID lights?
The insulation on the wires inside the housing have probably turned brittle and are creating a short when you hit bumps. Wires are way undersized. You may be able to rewire or use liquid electric tape.
If so, As I tell others. File a complaint with the NHTSB. This is clearly a safety defect which should warrant a recall.