Electrical mystery

[Arwwhg]

Took my boat out this weekend for the 1st time in a few months. Seems that I have an electrical issue that I am not sure where to start. Both batteries are good, but to start the port engine I have to use the emergency start parallel switch. I moved the batteries around so I am sure that both are good. port runs great, but when I turn it off, all electronics that are connected to the port side, turn off. If I depress the emergency start switch all electronics turn on. :smt021 Trying to find a wiring diagram for the boat, but I am having trouble getting one. any help would be appreciated.

 

[Arwwhg]

ok so i figured it out, turned out to be a bad ground. Traced all battery cables and checked all connections. I had one black cable that had a spongy feel where it connected to the engine. I took it off cut the cable, recrimped a new connection on the cable, cleaned everything up and then reconnected. So far so good.

 

[Gunn]

Thanks for the update. I appreciate when an unsolved issue is found and the post updated. It may help someone else (maybe even myself?!) searching for this topic in the future!