All ground wires burnt

[BruceK]

I did go back over the setup and found the 1 positive wire went to the isolator from start battery 1 and positive wire 2 to isolator from start battery 2 the black small wire coming from the bottom of my isolator went to battery 1 ground so all good
My issues is that the alternator from port engine charges the house bank 8 6 volts while the starboard charges the 2 start battery's that have the isolator
The helm gauges show voltages as high as 16 volts in cruise and low idle around 13 volt My meter tested volts at 14.7 at the start battery's
Is this a big concern ? My battery's are almost 6 years old but the start battery's test ok I just added water to all house battery but did not test them yet
I do leave the a/c chargers on full time so they should be fully charged
Thanks for all the help

Bob, first up, don`t go making virtually the same post in multiple places. People see one, then the other, and get confused where to reply.
Most people worry about batteries with low voltage.Someone who knows will surely respond, meanwhile here`s some thoughts.
*How did you test the batteries, simple voltage test, hydrometer, did you let them rest/apply a load to remove the surface charge?
*Is the new charge controller adjustable? What`s its output?
*You should test your house batts, properly. Could heavy charging disguise tired batts?
* What happens when you use the house bank normally, does the state of charge nosedive?
My battery voltages gauges don`t vary 3 volts between idle and cruise, or at all. To me,that`s odd. Over to the electricians.

 

[skipperdude]

I would quit trying to fix something that needs to be done over.

The wires are burnt. You are going to have to replace them anyway.

Start from scratch and do the entire thing new.

label every wire at both ends.

6 year old batteries replace them.

Big job but somebody has to do it.
At least you will know everything about your boats electrical system.

I wouldn't take that boat to the end of the slip the way it is.

SD

 

[yoeman]

I would quit trying to fix something that needs to be done over.

The wires are burnt. You are going to have to replace them anyway.

Start from scratch and do the entire thing new.

label every wire at both ends.

6 year old batteries replace them.

Big job but somebody has to do it.
At least you will know everything about your boats electrical system.

I wouldn't take that boat to the end of the slip the way it is.

SD[/QUOT
That's also part of the issue All wiring was done 4 years ago and I don't have a schematic
Im starting over

 

[skipperdude]

I would quit trying to fix something that needs to be done over.

The wires are burnt. You are going to have to replace them anyway.

Start from scratch and do the entire thing new.

label every wire at both ends.

6 year old batteries replace them.

Big job but somebody has to do it.
At least you will know everything about your boats electrical system.

I wouldn't take that boat to the end of the slip the way it is.

SD[/QUOT
That's also part of the issue All wiring was done 4 years ago and I don't have a schematic
Im starting over

Mechanical, electrical and plumbing. The three major systems on any boat.

I have rebuilt all three on my boat. If anything goes wrong I know just what to do. Understanding is half the battle.

I didn't do it because I wanted to. Where I live there is no boat yard.
Either fix it yourself or don't use the boat.

Like my signature says. If you can't fix it maybe it shouldn't be on the boat.

I can repair anything on my boat. Because I have to be able to.

Don't fret it. A little down time but once you get into it it's fun.

Sd