I agree. Ideally the Nav/anchor would be powered separate from all the pumps, lights and dimmers and so-forth, so if there is a problem with that system the Nav/anchor can continue on with a separate steady fused feed from the major feed wires for the helm fuse panel.
I was not suggesting fusing the Nav/Anc separately from the switch panel. That would cause complications with using it to light the other switches.
New Wire refers to illumination lamps as "Independant", meaning they are powered independant of switch position. "Dependant "indicate ON and are powered by the circuit itself.
what I was refering to was the "Independant " illumination of the switches.
Often the Nav/anchor switch is not "illuminated" it just indicates on. It is used to turn on the illumination of the other switches. It is a non-illuminated ON/OFF/ON with jumpers.
If you use the Dimmer off of the Nav/anchor, it won't dim the nav/anchor
The dimmer controls the"Independant" (pin 8 & 7) Illumination brightnes but not the "Dependant" ON indicator brightness
Read thru New Wires site because you may need to order a different switch (an Independant illuminated ON/OFF/ON) for the Nav/anc.
Your Fuel Gauge switch is another point for some thought. The old one was not powered, nor illuminated. It switched the pink and the pink/white sender wire to the gauge SENDER terminal.
You show it with a breaker. There is no power needed. I don't think you can light it dependant on switch position because there is no +12v being switched.
You could use an Independant illuminated ON-ON. I'm assuming you still need the switch for fuel gauge and can't read both on a MFD or CL7.