marine battery switch install question

[1Ktrailrider]

Amongst many things I am installing in my 16' pioneer 1k5 is a dual battery setup. With bus bars for ground, ACC, 12+ and a fuse block. Ill have plenty of questions about other electrical things since I'm not really qualified to do this type of work. Lol. but this is first.
The wire diagram on my marine battery switch shows a positive lead going to the switch from the engine. I have a positive from the starter solenoid to the battery but I don't understand what they mean by a positive from the engine to the battery.

 

[Eltobgi]

Amongst many things I am installing in my 16' pioneer 1k5 is a dual battery setup. With bus bars for ground, ACC, 12+ and a fuse block. Ill have plenty of questions about other electrical things since I'm not really qualified to do this type of work. Lol. but this is first.
The wire diagram on my marine battery switch shows a positive lead going to the switch from the engine. I have a positive from the starter solenoid to the battery but I don't understand what they mean by a positive from the engine to the battery.

View attachment 104384 View attachment 104385

What you have pictured is not what you want! Although it does have a combine feature it does not isolate your main battery from your auxiliary This is what I have with wiring diagram! Others use the True Isolator, but this set up is superior!

 

[1Ktrailrider]

What you have pictured is not what you want! Although it does have a combine feature it does not isolate your main battery from your auxiliary This is what I have with wiring diagram! Others use the True Isolator, but this set up is superior!
View attachment 104386 View attachment 104387

I cannot zoom in on that photo but my switch only has 3 connecting studs. Its a 1, 2, both, and off switch. And I don't have that second piece that is in the photo.

 

[Eltobgi]

I cannot zoom in on that photo but my switch only has 3 connecting studs. Its a 1, 2, both, and off switch. And I don't have that second piece that is in the photo.

Yes your switch is...
Either just battery 1
Either just battery 2
Both batteries combined
And off

The switch and diagram I posted is my recommendation for you!

Your switch is Simply for choosing either battery 1 or battery 2 or combining the two batteries to run as one. The battery selected will be the only one charging.

My recommendation included an ACR automatic charging relay which allows the charging of both batteries while also isolating the second battery from the main. This prevents killing both batteries, and allows running all accessories from the auxiliary or second battery.

An isolator is a must for every dual battery setup!

But here is another diagram if you are set on using your 1-2-combine-off switch

 

[1Ktrailrider]

Yes your switch is...
Either just battery 1
Either just battery 2
Both batteries combined
And off

The switch and diagram I posted is my recommendation for you!

Your switch is Simply for choosing either battery 1 or battery 2 or combining the two batteries to run as one. The battery selected will be the only one charging.

My recommendation included an ACR automatic charging relay which allows the charging of both batteries while also isolating the second battery from the main. This prevents killing both batteries, and allows running all accessories from the auxiliary or second battery.

An isolator is a must for every dual battery setup!

But here is another diagram if you are set on using your 1-2-combine-off switch
View attachment 104410

Okay. So I can see the latest diagram. But I don't get where the common goes. It shows to the engine but where? Its hard to explain things to somebody that doesn't understand 12v and its technologies. I appreciate your help..

 

[Eltobgi]

This should help because I think this is what you are trying to do!

 

[lee]

View attachment 104410

Dude, judging by your picture, your water crossings are too deep if you need an outboard.
Just sayin ...

 

[Landman]

Dude, judging by your picture, your water crossings are too deep if you need an outboard.
Just sayin ...

LMAO

 

[Eltobgi]

Dude, judging by your picture, your water crossings are too deep if you need an outboard.
Just sayin ...

Lol, no worries brother I am snorkeled

 

[Eltobgi]

Okay. So I can see the latest diagram. But I don't get where the common goes. It shows to the engine but where? Its hard to explain things to somebody that doesn't understand 12v and its technologies. I appreciate your help..

So if you watched the video and that is what you want, simply take the factory battery cable going to the positive battery terminal and mount it to common post. You will have to make a new positive cable that will go from your battery post to the battery 1 stud.

 

[1Ktrailrider]

So if you watched the video and that is what you want, simply take the factory battery cable going to the positive battery terminal and mount it to common post. You will have to make a new positive cable that will go from your battery post to the battery 1 stud.

I finally understand. Indeed. I have it all hooked up except the common. I will do it tomorrow and see what happens. I'm hoping it works like I think it will. Separating the batteries and turning all the power off.