As shown in the pic F7 LHS is not illuminating.The fuse is 5 amp XB13.2 labeled "Reserve" on my diagram also "Bilge Pump Manual Override"

The connectors that plug into sockets XB13.2 have wires labeled "Cockpit Lights"

My cockpit lights are not working but the fuse and the sockets are all good.

Is there somewhere else I should be looking?

Regards to all

Duncan

By cockpit lights, could it mean the 12V "stick" lights that insert into the outlets by the X5000 displays?    The ones that are touch activated?

Not sure what the question is to be honest.     Are you asking what the button controls?  Or asking how to get it illuminating?   I guess the first question is whether its controlling the cockpit lights (or whatever) properly.     I thought if the fuse was bad then the wurth panel blinks (not goes out).  

I have a diagram for the wurth panel, but my experience has been that the labels on the wiring are more accurate.     

Once again comments to questions gets the mind working better.My cockpit lights are an aftermarket add on and I have found some faulty switching.So all good there.

Going back to the LHS F7 which illuminates when  only when pressed. But nothing happens as far as I can tell.My question now is what does this switch control.

I wonder if you can maybe tell me where does the NMEA 2000 power supply come from and where and  how is it connected to the 12v system.

Many thanks for your advice and help

Best regards

Duncan