Voltage Limiter

And by the way... I do believe I see a contact pin missing from your printed circuit board. That pin conducts to 3 of your illumination sockets. So looks like that's why they don't work. That's fixable also. Just solder a length of wire to that copper trace anywhere available and add male female spade terminals to the respective wire ( should be orange ). I'll assume for now that illumination is good at the smaller circuit board ( orange wire makes up there ). Maybe just new bulb(s) required over there.