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mr matt Samba Member
Joined: May 26, 2005 Posts: 819 Location: southeast Pa
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Posted: Sun Sep 18, 2005 4:49 pm Post subject: Is it possible to jump a 6 volt battery with a...... |
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12 volt battery ( you guessed it) - or will this be too much for the cars' electricals?
Unfortuantely I left my 55's light s on few a few hours and the battery drained. Was able to push start it, but was wondering if I could jump it with a 12 volt from another car - I had that option at the time, but decided to push the car to get it going.
Thanks
Matt |
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Riff Raff Shivering Sambian
Joined: October 25, 2004 Posts: 3097 Location: Alberta
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Posted: Sun Sep 18, 2005 5:47 pm Post subject: |
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I may get jumped on for this, but yes, you can do it. Do it fast though as it may cause your battery to boil. Make sure nothing else is turned on in the car, you sit in the drivers seat and have a buddy hook up the cables. As soon as you have contact, crank that baby over and undo the cables!
12V sure makes the 6V starters come to life!
It's probably easier just to push start it though. _________________ The greatest obstacle to discovery is not ignorance, but the illusion of knowledge
- Daniel Boorstin |
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'55oval Samba Member
Joined: July 06, 2004 Posts: 285 Location: Sewell,NJ
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Posted: Sun Sep 18, 2005 6:30 pm Post subject: |
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Mr. Matt
I tried that once, 12 to 6v, and blew the side of the battery out. Not pretty.
Steve sjvwc |
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berniedd1 Samba Member
Joined: October 20, 2003 Posts: 155
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Posted: Mon Sep 19, 2005 7:41 am Post subject: |
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That's a dangerous move. Don't do it. |
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EverettB Administrator
Joined: April 11, 2000 Posts: 69835 Location: Phoenix Metro
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Posted: Mon Sep 19, 2005 8:28 am Post subject: |
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The only time I would do that is in an emergency and it won't push start.
If it's at home, put it on the battery charger. If you don't have one - buy one.
If you need to do it, use 2 people:
Hook up the jumper cables to the 12v battery and the other negative side.
Have a friend just touch the positive side to your 6v battery while you crank it.
As soon as the car starts, he should pull the cable away.
I have done it a few times using this method with no problems. _________________ How to Post Photos
Everett Barnes - [email protected] | My wanted ads
"Water is the only drink for a wise man" | "Communication prevents complaints"
Stop dead photo links! Post your photos to The Samba Gallery! |
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mr matt Samba Member
Joined: May 26, 2005 Posts: 819 Location: southeast Pa
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Posted: Mon Sep 19, 2005 9:05 am Post subject: |
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OK thanks, I was a little nervous about it - sounds like a last resort measure.
Matt |
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keifernet Samba Search & Rescue
Joined: May 11, 2002 Posts: 19395 Location: Samba Center for Behavioral Science
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Posted: Mon Sep 19, 2005 12:31 pm Post subject: |
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EverettB wrote: |
The only time I would do that is in an emergency and it won't push start.
If it's at home, put it on the battery charger. If you don't have one - buy one.
If you need to do it, use 2 people:
Hook up the jumper cables to the 12v battery and the other negative side.
Have a friend just touch the positive side to your 6v battery while you crank it.
As soon as the car starts, he should pull the cable away.
I have done it a few times using this method with no problems. |
Yep... do it fast... wear some gloves and safety glasses, long sleeved clothing if available. |
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WM971252 Samba Member
Joined: September 10, 2004 Posts: 1781 Location: Franklin CT
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Posted: Mon Sep 19, 2005 3:58 pm Post subject: |
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Even better if you start cranking then connect your 12v source. |
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Rick Samba Member
Joined: December 17, 2003 Posts: 1539 Location: Soquel, California
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Posted: Tue Sep 20, 2005 7:25 am Post subject: |
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this brings up another question. Couldn't you make a device to step the voltage down from 12 to 6? You could carry it in the car for those situations on the road where the chance of finding another 6 volt car is about nil. Any electrical wizzes out there? |
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Riff Raff Shivering Sambian
Joined: October 25, 2004 Posts: 3097 Location: Alberta
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Posted: Tue Sep 20, 2005 8:28 am Post subject: |
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No electrical whiz here, but you could use a second 6V battery.
Just have to hook up the 6V batteries in series.
(12V Positive lead hooked to Battery #1 Positive terminal, Battery #1 Negative terminal hooked to Battery #2 Positive terminal, Battery #2 Negative terminal hooked to 12V negative lead)
I had to do this to charge my 6V battery with a 12V only charger. I just hooked up two 6v batteries in series and charged them with 12V overnight.
Carrying around a spare 6V battery is hardly prudent though!
I don't know of any step down devices that could handle that level of current draw. _________________ The greatest obstacle to discovery is not ignorance, but the illusion of knowledge
- Daniel Boorstin |
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mr matt Samba Member
Joined: May 26, 2005 Posts: 819 Location: southeast Pa
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Posted: Tue Sep 20, 2005 5:46 pm Post subject: |
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Fortunately, I do have a charger that can charge 6 volt batteries. Does help to have one - jyust need to get the dead bug near an outlet
matt |
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PEPPE Samba Member
Joined: August 24, 2003 Posts: 1068 Location: Roma Italy
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Posted: Wed Sep 21, 2005 1:26 pm Post subject: r |
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i have done but used to jump the cables in the moment the key is already in the cranking position. when the solenoid is on, there will be less overall voltage in the 6v battery.
use normal cheap cables, big copper cables can cause problems of excessive current |
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Rick Samba Member
Joined: December 17, 2003 Posts: 1539 Location: Soquel, California
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Posted: Thu Sep 22, 2005 8:09 pm Post subject: Re: r |
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PEPPE wrote: |
i have done but used to jump the cables in the moment the key is already in the cranking position. when the solenoid is on, there will be less overall voltage in the 6v battery.
use normal cheap cables, big copper cables can cause problems of excessive current |
come to think of it I've had to jump my truck with romex and the voltage drop was a killer, even with 10 feet or so, but it worked. Maybe you could just throw a 50 foot roll of 12-2 romex in the bug and that would miraculously give you enough voltage drop to bring 12 down to 6! |
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53 0val Samba Professor
Joined: July 03, 2003 Posts: 11396 Location: Irvine, CA
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Posted: Thu Sep 22, 2005 8:22 pm Post subject: |
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Somebody help me out here..........I think you can charge a 6 volt battery with a 12 volt charge. Connect the batteries together start the 12 car......do not start the six volt car.......let the 12 volt battery charge the 6 volt for 5 minuets. Turn off the 12 volt source. d Disconnect the cables and start the 6 volt car. Enough charge should have been transferred to start the car but not ruin the battery. Anybody ever tried this..........or am I way out here? _________________ "What a fool believes he sees, no wise man has the power to reason away." Dobee, Dobee, Do |
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Mark Evans Samba Member
Joined: April 21, 2004 Posts: 1931 Location: Alsea,Oregon
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Posted: Fri Sep 23, 2005 5:10 am Post subject: |
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WM971252 wrote: |
Even better if you start cranking then connect your 12v source. |
If I HAD to, that's the way I'd do it. |
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Levonbenelli Samba Member
Joined: September 28, 2004 Posts: 1171
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Posted: Fri Sep 23, 2005 11:51 am Post subject: |
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53 0val wrote: |
Somebody help me out here..........I think you can charge a 6 volt battery with a 12 volt charge. Connect the batteries together start the 12 car......do not start the six volt car.......let the 12 volt battery charge the 6 volt for 5 minuets. Turn off the 12 volt source. d Disconnect the cables and start the 6 volt car. Enough charge should have been transferred to start the car but not ruin the battery. Anybody ever tried this..........or am I way out here? |
that actually sounds pretty good! _________________ Wanted: flipseat parts: rear jump seat, folding chair, cups |
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mr matt Samba Member
Joined: May 26, 2005 Posts: 819 Location: southeast Pa
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Posted: Fri Sep 23, 2005 5:01 pm Post subject: |
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53 0val wrote:
Somebody help me out here..........I think you can charge a 6 volt battery with a 12 volt charge. Connect the batteries together start the 12 car......do not start the six volt car.......let the 12 volt battery charge the 6 volt for 5 minuets. Turn off the 12 volt source. d Disconnect the cables and start the 6 volt car. Enough charge should have been transferred to start the car but not ruin the battery. Anybody ever tried this..........or am I way out here?
I'd disconnect the cables to the 6 volt battery - isn't there current still going somewhere? - horn, starter switch...? |
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53 0val Samba Professor
Joined: July 03, 2003 Posts: 11396 Location: Irvine, CA
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Posted: Fri Sep 23, 2005 5:10 pm Post subject: |
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I don't think so, because the voltage regulator isn't working until generator turns over. _________________ "What a fool believes he sees, no wise man has the power to reason away." Dobee, Dobee, Do |
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EverettB Administrator
Joined: April 11, 2000 Posts: 69835 Location: Phoenix Metro
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maetl Samba Member
Joined: October 26, 2005 Posts: 174 Location: Bend, OR
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Posted: Tue Nov 15, 2005 12:54 am Post subject: |
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One of my buddies and I were talking about this, and he said you simply switch the neg and pos connections. IE, pos to neg, and neg to pos. |
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