The SJ 16/2 cable used to connect the bow and stern running lights in Windstar has not stood the test of time. This cable is intended as portable cordage, and has rubber-insulated conductors inside a neoprene jacket. The conductors' insulation is crumbling and just waiting to create a short and tripped breaker. The prince of darkness lurks... Will post pics, it's toast, and it's now gone.
The PVC insulation used throughout the rest of the boat is fine, it's just the length from the light, through the pulpit/pushpit to the bullet connectors below deck, where the lights connect to the harness. The neoprene cable jacket is likely in much better condition than the conductors' insulation, therefore this failure is not evident by simply inspecting the cable from the outside. Check the conductors themselves. Pics here http://cncwindstar.blogspot.ca/2017/05/navigation-light-cable-deterioration.html Dave
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