Electrical problems coming my way - 08 210 no power

[ally505]

This is a bit of a weird one. I have an '08 210 that has a toggle switch at the helm to switch between bilge operation only and powering up the full boat. I don't have an electrical schematic, however I believe when powering up the boat it is feeding directly, or via a relay, the switch panel on the right of the dash (blower, pumps, nav lights, ignition etc.). Recently when following the standard procedure to turn the boat ignition on, the boat has been dead despite the toggle switch switched to run all the electrics. After a min or so it seems to come to life and then runs flawlessly all day until the ignition has been switched off for a few hours again.

Does anybody have a wiring schematic or has this type of fault been seen previously? I would suspect I have a relay on its way out but need to do a little digging before I get to the bottom of this. Being intermittent it may be a challenge to replicate and fix until it fails for good.

Thanks

[Nautiquehunter]

Those toggle switches have a history of going bad I would start there .

[ScooterMcgavin]

This diagram is from this site, hopefully it helps you out. It’s for 210/220
https://planetnautique.com/CorrectCr...g220TM_LTD.pdf

[Hexa73]

Bypass the toggle switch by connecting the wires directly, it will tell you if the issue came from switch