I'm back. I worked on my Nav. lights yesterday and still have a problem I can't solve. When I switch to nav. I get the bow light only. When I switch to anchor I get the stern light only. I took the diode out and jumpered with a wire from the top terminal to the bottom terminal. When the switch is set to Nav. the bow light goes out and the stern light comes on. The middle position everything is off. So my next plan is to hook both lights up directly and see if they will both come on at the same time. If they do can I assume I have a bad switch?
Based on the symptoms, a defective switch is highly unlikely.
The Panel lamps will commonly be wire to the NAV Lights, it can be assumed you will be underway. Off when ANChored.
If, with the Diode OUT; NAV= Bow Only, and ANC= Stern Only, and OFF = All Off ....
Adding a jumper from Top to Bottom should have produced Both-Off-Both ... IF... IF! ...
IF the Center Terminal is Truly, and Always, 12v Power, in ALL Positions. Was this Confirmed? (Post #7)
Assume Nothing until confirmed!