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Amel Super Maramu 2000

Tricolor & Anchoring Lights not working.

Tricolor as well as Anchor lights stop working.

I thought it was the bulb, but not.
I thought it could be the electric wire in the mast.

Interesting coincidence that both of the non-working lights have cables coming from that box.
The top little "thing" seems broken or burnt
What is that black box for?
How to fix it or get a new one?

Thanks in advance.

 tricolor mast light

 anochor mast light

 tricolor navigation mast light

 anochoring mast light

 tricolor mast light

 btricolor mast light