[C320-list] Another battery-related question

[Jeff Hare]

This might indicate that the red power cable you hooked up initially to your
new battery was the one that powers the DC Panel.

The boat comes from the factory with 2 - 4D sized semi-deep cycle batteries.
Most likely, one of them died and he just removed it from the system.  The
only wire he wouldn't have had any use for was the large ground Jumper that
connects both Negative terminals.  He MAY have also removed the cable from
position "2" on the switch to avoid having this wire hanging around which
would become live whenever "both" was enabled on the switch.  That would
pretty much explain what you're seeing.

So... I think you need a Chunk of red 2/0 cable to connect between the
switch's battery position 2 and the new battery's positive post.  And a
chunk of Black or Yellow 2/0 cable to connect both battery Negative
terminals together.  Then, you're off to the races...

BTW, your boat is only 38 hulls off of ours, so the stock wiring would be
virtually identical.   I would shut off the AC power and remove the wooden
panel where the battery switch is located and check to see if this is the
case.  To do that, you just need to remove a few screws that hold the panel
in place (also the blocks that hold vertical upright in place).  There's an
AC outlet there so that's why you should kill the AC power first, and also
wouldn't hurt to disconnect either the ground wires from the batteries to
prevent any accidents there also..

Cheers!
-Jeff 

  

-----Original Message-----
From: c320-list-bounces at lists.catalina320.com
[mailto:c320-list-bounces at lists.catalina320.com] On Behalf Of Dean Vermeire
Sent: Tuesday, September 06, 2011 5:28 PM
To: C320-List at Catalina320.com
Subject: Re: [C320-list] Another battery-related question

Hi Ken,

Yes, I selected "1", "2", but not "All" when I had only one set of cables
attached to the battery.  What confused me was that I had power to the radio
with the appropriate battery selected, but no juice to the engine.

All I can figure is that there is something unusual in the wiring that was
done when a previous owner put in the one ginormous 4D battery, rather than
two batteries.

Thanks,
Dean

On 9/6/2011 4:21 PM, Jane & Ken wrote:
> A thought---If the 'new' group 27 was initially connected as indicated,
and batt 1 was selected without any start power----then the 'new' battery
was connected to the 'othr' cables and selector batt 2 resulted in nothing--
DEAN, did you also turn the selector to batt 1 , then batt 2, then batt all,
without any success??  My hull #219 had the # 1 / # 2 backward.
>      However, Jeff's comments are correct and should be followed when 
> adding the two batteries--and a dedicated group 27 starting battery.  
> Ken, OBUOY #219
>
> --- On Tue, 9/6/11, Jeff Hare<catalina at thehares.com>  wrote:
>
>
> From: Jeff Hare<catalina at thehares.com>
> Subject: Re: [C320-list] Another battery-related question
> To: C320-List at Catalina320.com
> Date: Tuesday, September 6, 2011, 3:31 PM
>
>
> This should work. If the 1-2-both switch is acting like an on/off then the
new battery probably wasn't hooked up quite right.
>
> In proper hookup, both battery negatives should be connected directly
together. One heavy red from one battery positive should go to the "1" post
of the switch, the second heavy red should go to the "2" post on the switch.
The "C"ommon post of the switch goes to the starter and the "house" power
panel.
>
> The 4awg red cables are usually shore power charger and windlass power.
>
> Check carefully for the 3 foot section of black 2/0 gauge cable that is
the key ground between both batteries. If the prev owner only had one
battery, he may have also disconnected that jumper and left it in the
compartment somewhere. You need that.
>
> -jeff
> -jeff
>
> Dean Vermeire<dean at vermeire.us>  wrote:
>
> Hi Jeff,
>
> I'm familiar with the wiring that you've described. Makes perfect sense.
>
> In my case, there was only one battery to start with. Both positive 
> cables, as well as the two heavy ground cables and the smaller ground 
> cable were connected to the one 4D battery. There was no jumper.
>
> When I replaced the 4D battery with a group 27 battery, I found that I 
> had to connect all cables the way I had found them, which sounds 
> obvious. What surprised me was that I couldn't have one battery 
> connected to just one set of cables with the switch set to that 
> battery and have the engine start. Basically, the two battery switch 
> really only acts as an on / off switch when both sets of cables are 
> connected to only one battery.
>
> On 9/6/2011 10:14 AM, Jeff Hare wrote:
>> We can only speculate here without some pictures of the wiring you're
referring to, but what may have happened was that you didn't get all the
grounds connected.
>>
>> The starter/engine ground connects via heavy cable to the aft most
battery, then a jumper continues to the forward battery. The forward battery
typically has the windlass ground attached also. Is it possible you didn't
get the heavy ground between the batteries connected? All grounds need to be
connected.
>>
>> Jeff
>>
>> Dean Vermeire<dean at vermeire.us>  wrote:
>>
>> Hi Folks,
>>
>> You'd think that all possible questions have been asked by now, but I 
>> came up with another this weekend. When we got out to the boat for a 
>> nice long weekend and were ready to head out, the engine would not 
>> start. The batteries just didn't have enough juice for it.
>>
>> This is the first time I have had to get at the batteries on this 
>> boat, so please forgive the stupidity here! When I got at the 
>> batteries, I found that there was really only 1 there - a 4D truck 
>> battery (which others have recommended lately). That's fine. Nice to 
>> know. I ran over to the marina store (the only place open on Sunday) 
>> and bought a Group 27 Deep Cycle battery. I will probably put in a 4D 
>> again, since the battery tray fits a 4D perfectly.
>>
>> When I hooked up the new battery. I only connected one set of battery 
>> cables. I put the switch on "1". The radio, instruments, VHF, etc. 
>> all worked fine, but the engine did not turn over. Not even a click. 
>> I switched the cables on the battery and put the switch on "2". Same 
>> thing. Finally, I put the cables the way I had found them, with both 
>> sets of cables hooked to the one battery. I probably put the switch 
>> on "All", although I don't understand what difference it would make. 
>> The engine started right up.
>>
>> The boats I have had in the past had two batteries. I made it a habit 
>> of switching to just one battery once the engine was off, to make 
>> sure I would have enough power to start up again later. Having both 
>> sets of cables on one battery seems to be contrary to that idea.
>>
>> So, why didn't the engine have power when I had just one set of 
>> cables on the battery and have the switch set to that battery number?
>>
>> Humbly,
>> Dean Vermeire
>> Moonstruck II (#847)
>>
>>
>>
>
>