Engines shut down

[Nagaj54]

I have a 38’ Sundancer with 8.1 HO’s.
Both engines at same time shut down.
I will get a system beep and both will shut down. No codes will come up. It is at Random times but mostly just after start up. Most times all gauges shut down and engines stay running. Only few times engines shut down as well.
Any ideas what could cause this?

 

[Lazy Daze]

Start simple...

Remove, clean, re-tighten all connections at all batteries, including grounds.

Remove your key switches and your rocker switches for start/run and do the same.

 

[dtfeld]

If you have a generator, there might be an issue with your fire suppression system. That would shut both down simultaneously.

 

[Bill Curtis]

^^^^^ #1

 

[Korkie]

Plus 1 on Lazy Days. Also check grounds on engines, power connections at starter solinoid and alternator connections. Had same problem and removed every connection related and it went away.