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Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Jul 2007 Posts: 36 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2007 Posts: 36 | If a person was ever stranded could you jump start a 6 volt system from a modern 12 volt system vehicle ? Thanks
Last edited by backn37; 09/27/2009 4:39 AM.
It's not the speed you travel it's the quality of the trip that matters !!!
| | | | | Joined: Jul 2001 Posts: 3,887 Cruising in the Passing Lane | | Cruising in the Passing Lane Joined: Jul 2001 Posts: 3,887 | yes .... best not to have the 12v vehicle running, and don't leave them hooked up any longer than necessary to do the job - if there's a problem, it'll more likely be with the new computerized vehicle  Bill | | | | | Joined: Feb 2004 Posts: 29,835 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,835 | I would reccomend disconnecting the battery on the 12 Volt vehicle to avoid any possibility of a voltage spike damaging the alternator or the computer. Of course, if it's an old-school rig with a generator and a point-type distributor that just happens to be 12 volt, no problem. Don't make any sparks around the top of the hot battery, as that's inviting a hydrogen explosion. Get the cables attached to the top of the 12 volt battery first, then attach the + cable to the top starter connection, then put the - cable somewhere that's a good ground like the generator bracket, etc. You'll get some pretty nasty sparks as the ground is connected because the 12 volt battery is going to start fast-charging the 6V immediately. Don't stay hooked up for long!
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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| | | | | Joined: Jan 2008 Posts: 4,962 'Bolter | | 'Bolter Joined: Jan 2008 Posts: 4,962 | As was mentioned earlier, don't leave them hooked up long. Its better to make it a 2 man job. Hook her up, have the other guy immediately hit the starter, and immediately disconnect it. I now use the 12 volt emergency starter kits that are sold every where. At least I don't have to worry about screwing up an alternator or ecm. | | |
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