the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
icon

disconnecting the battery on a vehicle


Post ReplyPost New Topic
< Prev Topic Next Topic >
rosedalechip 
Member - Posts: 5
Member spacespace
Joined: November 27, 2007
Location: Florida, United States
Posted: November 27, 2007 at 10:53 PM / IP Logged  

I have heard that on some cars removing either the negative or positive post on a car battery first would keep the vehicles computer settings from getting screwed up. Is there a right way or a  wrong way to remove a battery? Is this true on certain cars? Can anyone verify this?  Excuse me if  the questions seem silly !   I just don't like not knowing.

I hear voices in my head !
haemphyst 
Platinum - Posts: 5,052
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: November 28, 2007 at 12:32 AM / IP Logged  
My understanding is that neither will or should matter. Once you disconnect the power from EITHER terminal, the car is electrically dead.
I can't see how disconnecting one or the other first could make any kind of a difference.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
rosedalechip 
Member - Posts: 5
Member spacespace
Joined: November 27, 2007
Location: Florida, United States
Posted: November 28, 2007 at 11:39 AM / IP Logged  

Thanks I appreciate it.

I hear voices in my head !
donpisto 
Member - Posts: 49
Member spacespace
Joined: April 15, 2004
Location: United States
Posted: November 28, 2007 at 12:29 PM / IP Logged  

Disconnect: negative then positive

Reconnect: positive then negative

If you were to disconnect the positive first, your vehicle is still grounded, that's a no-no. Also, if you're wanting to hook up an amplifier and whatnot, just disconnect the negative and that's it.

audioman2007 
Copper - Posts: 580
Copper spacespace
Joined: February 20, 2007
Location: United States
Posted: November 28, 2007 at 2:42 PM / IP Logged  
i have a 02 cavalier and I am able to disconnect both battery terminals without losing my computer info. I just need to reconnect in a certain amount of time
haemphyst 
Platinum - Posts: 5,052
Platinum spaceThis member has been recognized as an authority in Electrical Theory. Click here for more info.spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spacespace
Joined: January 19, 2003
Location: Michigan, Bouvet Island
Posted: December 11, 2007 at 1:34 PM / IP Logged  
donpisto wrote:
Disconnect: negative then positive
Reconnect: positive then negative
There is a perfectly valid reason for that. If you disconnect the positive first, the car is still grounded to the battery, and the possibility of landing a tool across the positive terminal and the chassis is very real. In a positive ground car, such as older VW bugs, you disconnect the positive terminal first, for the same reason.
donpisto wrote:
If you were to disconnect the positive first, your vehicle is still grounded, that's a no-no.
There is no other reason than what I have stated above to remove the negative battery cable first. It's for safety only.
It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."
advanced_audio 
Copper - Posts: 170
Copper spacespace
Joined: July 07, 2006
Location: United States
Posted: December 11, 2007 at 1:39 PM / IP Logged  
Also would like to add, make sure you have the code for the radio if it has the theftlock crap on it, before you disconnect the car from the battery.

Sorry, you can NOT post a reply.
This topic is closed.

  Printable version Printable version Post ReplyPost New Topic
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot delete your posts in this forum
You cannot edit your posts in this forum
You cannot create polls in this forum
You cannot vote in polls in this forum

  •  
Search the12volt.com
Follow the12volt.com Follow the12volt.com on Facebook
Monday, November 29, 2021 • Copyright © 1999-2021 the12volt.com, All Rights Reserved Privacy Policy & Use of Cookies
Disclaimer: *All information on this site ( the12volt.com ) is provided "as is" without any warranty of any kind, either expressed or implied, including but not limited to fitness for a particular use. Any user assumes the entire risk as to the accuracy and use of this information. Please verify all wire colors and diagrams before applying any information.

Secured by Sectigo
the12volt.com spacer
the12volt.com spacer
the12volt.com spacer
Support the12volt.com
Top
the12volt.com spacer
the12volt.com spacer