Electric issue Prestige 400

[swede]

Hi
I'm new on this forum and I have just bought à Prestige 400 fr.o.m. 2011. I have problem with the 12 v system. It doesnt work if engine not running! When engine or shore power is on all elctricity works perfect but as soon I stop engine or unplug the shore power the 12 v system dont work. All service batteriets are new. The + button on swirhboard is turning off when stopping motor or shore power is unplugged. When I try to switch it on again the releay (dont know the english Word ) push it off again.
Anyone familiar with the problem or have à suggestion what it can be?
Looking forward to good suggestions!
Magnus

[mmlogan]

Swede,

I have a 2015 550 fly. On my electrical panel, there are separate switches for 24 volt power supply to the engines and 12 volt power for convenience. Do you have a switch somewhere that activates the convenience 12 volt system separate from the power to the engines?

Best of luck,

Matt