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Unread 03-02-2013, 12:52 PM   #1
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Default Voltage reducer after the key switch? Will it shut off the radio?

Hi all,

I was about to start a little "stereo project" for my 2007 Yamaha Drive 48V, but before I get too carried away, I wanted to double check to make sure that what I was about to do is going to work.
So, I plan on installing a radio, two 6.5" speakers (mounted in speaker pods), an amp and a 10" boston acoustics sub (inside of a bazooka tube). On top of all that, I was hoping to install a couple of remote actuators (something like what I saw in one of Hotcats threads) under the seat to keep the seat locked, a digital voltage status indicator, a 3-way round key switch (again, inspired by Hotcat), and a 12V outlet.

My goal was to run all of these things off of a Blue Sea distribution block (with ground bus) coming from a 20amp voltage reducer.

I have been having trouble finding information on "how" to go about installing the stereo so that the power turns off when the key is turned off.

Here's what I was thinking...my original key switch (according to the Yamaha YDRE manual) is, basically, just a break in the main 48 volt positive line to everything (ie. controller, etc.). So, I'm thinking if I install the voltage reducer after the key switch and run the negative to the negative on the last battery, my thoughts are that the voltage reducer (and everything running off of it) will shut off when the key is turned off. Yes, no, I don't know?

Does this seem to make sense?? If I run the remote wire for the stereo to the first battery positive post, then the memory for the radio should not get cleared?

Anyway,

That's all I can think of right now, it's beer o`clock.

Thanks for any help you can give.
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Unread 03-02-2013, 07:15 PM   #2
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Location: Liberty SC, Garden City SC
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Cool Re: Voltage reducer after the key switch? Will it shut off the radio?

If it's a 48 volt to 12 volts reducer yes thats all you need to do to turn everything off.
Now for another idea.
If you get a good marine grade 12 volt battery and put another 48 volt solenoid in line with the orignal solenoid to turn on and off with the key switch then hook the cable from 12 volt battery to one side of the solenoid and the rest can go wherever to a fuse block are straight to the brake lights and when the key is off so is the 12 volts stuff.
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Unread 03-02-2013, 10:57 PM   #3
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Default Re: Voltage reducer after the key switch? Will it shut off the radio?

Thanks Andy4639,

I thought about going with the separate battery, but for two reasons, I chose not too.

The first is, around here (where I live) the cost of a marine battery is more than what I would spend on a 48-12V voltage reducer, not to mention the cost of a charger. And maybe I could find something for around the same price and maybe a bit cheaper, but, that brings me to number two. I plan on the using the spare space below the seat for my amp and sub install. After that there wouldn't be enough room for the battery.

Again, thanks for the feedback. I'm not an electrician or even a stereo specialist by any stretch of the words. I like to fiddle, so to speak, so anything I think of is not based on any knowledge or experience, just curiosity and ignorance.

I'll re-post my progress in case anyone is looking to do something similar down the road.
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Unread 03-05-2013, 02:06 PM   #4
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Default Re: Voltage reducer after the key switch? Will it shut off the radio?

my 2 cts,buy the converter that is key activated and I believe it comes in a 30amp version,you might be alittle light at 20 amps for all the stuff you want to run.The main feed in to the converter both pos and neg are 10 or 12 ga depending on the converter,the feed to the ignition switch is 16 or 18 ga problem,plus the increase in amps across the switch.As far as the radio memory the only way is with the aux battery that Andy mentioned or to run the converter full time.If you relay the converter to an extra switch you can have it all when using the cart and switch it off when stored,a full time converter will kill a pack in a short time of no use..Dave
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Unread 03-05-2013, 06:53 PM   #5
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Wink Re: Voltage reducer after the key switch? Will it shut off the radio?

I put a toggle switch on the memory wire so that when I'm at the beach and charge the battery good I leave it on while there but when I leave the beach house I flip the toggle switch on the memory wire and it doesn't drain the battery.
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Unread 03-16-2013, 05:24 PM   #6
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Default Re: Voltage reducer after the key switch? Will it shut off the radio?

Andy4639, I am installing a 12V battery for accessories in my 1996 EZGO 36V series and I also want to have this turn off with the key switch. How do I wire up another 36V solenoid in line with my existing one to make this happen like you suggested here?
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Unread 03-16-2013, 05:59 PM   #7
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Default Re: Voltage reducer after the key switch? Will it shut off the radio?

I would do what Andy said , voltage reducers can be problematic , can cause batt issues , I would feel much better that I know all my accessories are not being drawn off my battery pack , but off a separate 12 volt battery do not cheap out , I would far better spend my money on a marine battery , then find out a year later I have battery issues .
Good luck
Cheers !
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Unread 03-16-2013, 06:18 PM   #8
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Default Re: Voltage reducer after the key switch? Will it shut off the radio?

Great white north, do you know how to wire up the solenoid, battery and key switch like Andy suggested?
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Unread 03-16-2013, 06:58 PM   #9
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Default Re: Voltage reducer after the key switch? Will it shut off the radio?

Just use search on the site there is a thread there that shows how it is done

Cheers !
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Unread 03-16-2013, 07:08 PM   #10
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Default Re: Voltage reducer after the key switch? Will it shut off the radio?

Great White North, Im sorry but Im new here and have been searching for this answer for hours here. Do you have the link to the thread or what I need to search for exactly?
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