... the only thing I lose when I pull the battery (even for weeks at a time), are the MPG and RANGE data on the DIC. My radio stations even stay as they were set, which is amazing.
How to keep car LIVE while changing battery
Thread Starter
Pro
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From: Norwalk CT and Boynton Beach FL
How to keep car LIVE while changing battery
My battery is 5+ years old and I'm going to change it before it fails on me. I'd like to keep all the electrical systems live while I swap out the old battery for a new one so I don't have to reset everything and I can get power from my other car .
I can connect the ground (neg) to any metal part on the engine, but where should I connect the Positive to? Any reason not to do this?
Thanks
I can connect the ground (neg) to any metal part on the engine, but where should I connect the Positive to? Any reason not to do this?
Thanks
Team Owner
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St. Jude Donor '03-'04
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From: PNW
Le Mans Master
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Well, MAYBE. I've seen several GM's that had weird things happen when the system came live again (in older cars mind you). The worst I've seen is the AC blend door actuators freak out when the power is reapplied. It's RARE but can happen.
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St. Jude Donor '03-'04
I hope you mean that price is crazy low...but with the insertion of the 
I think you thought the price was high. the battery and the connector cost that much to buy anywhere.. for those who dont have a cigarette adaptor lying around.. they sell these things for under 5 bucks at harbor frieght... 5 dollars is a lunch time tip to the waitress.
That price is crazy????? really. Pretty sad comment at best
I think you thought the price was high. the battery and the connector cost that much to buy anywhere.. for those who dont have a cigarette adaptor lying around.. they sell these things for under 5 bucks at harbor frieght... 5 dollars is a lunch time tip to the waitress.That price is crazy????? really. Pretty sad comment at best
Last edited by Evil-Twin; Sep 13, 2010 at 09:09 AM.
Tech Contributor
Joined: Jan 2007
Posts: 19,567
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From: Dyer, IN
I hope you mean that price is crazy low... the battery and the connector cost that much.. for those who dont have a cigarette adaptor lying around.. they sell these things for under 5 bucks at harbor frieght... 5 dollars is a lunch time tip to the waitress.
That price is crazy????? really
That price is crazy????? really
Yeah ET.....I'm joking. I just think it's funny that someone who owns a $50,000 sports car, would not spend $5 for such a useful little gadget.
Team Owner
Joined: Mar 2001
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From: small town in S.E Pa. PA
St. Jude Donor '03-'04
I offered him a very simple solution to his query. You have to remember that Newbies, and some of us old timers may not get the humor, that others seem to feel is obvious... Ive been around the block a few times and here for a very long time , and I didn't get it...
Bill aka ET
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From: Columbia SC
Whenever I unhook and reconnect the battery in my '03, I get a terrifying series of pops, clicks, snaps from the car, plus the clank-clank-clank of the CD changer activating. It also often, as the forum member above mentioned, seems to set codes for my Dual-zone HVAC actuators. This last particularly concerns me, as those codes sometimes seem reluctant to clear and I am afraid one day the battery changing/unhooking might mess the actuators up permanently. Do you nice people think the use of that 9V tool would keep all that quiet, or would it only save your radio and etc. settings? In other words, is 9 volts enough to retain power to all these things that are causing me worry, or will some of them require the full 12 volts? Would appreciate some input from those of you less ignorant concerning electricity than I am. Regards, Ralph Boineau in central South Carolina
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From: Not on either liberal coast.
I've used the 9v battery device shown above on two or three battery swaps of electronics laden late models. None of the settings were lost. It's simpler than trying to use a jumper from another car.
Just keep in mind that the 9v battery won't last for hours and hours.
Just keep in mind that the 9v battery won't last for hours and hours.
Last edited by hotwheels57; Sep 13, 2010 at 12:30 PM.
Le Mans Master
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From: PNW
I've used the 9v battery device shown above on two or three battery swaps of electronics laden late models. None of the settings were lost. It's simpler than trying to use a jumper from another car.
Just keep in mind that the 9v battery won't last for hours and hours.
Just keep in mind that the 9v battery won't last for hours and hours.
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From: Norwalk CT and Boynton Beach FL