Changing Battery
Thread Starter
Melting Slicks
Joined: Aug 2004
Posts: 3,078
Likes: 101
From: Riverhead New York
Changing Battery
I am going to change the Battery in our 2004 Yukon. Do I need to keep 12 Volts in the system while replacing Battery? (I struggle with these Newer cars!). LOL Al W.
Race Director
Joined: Nov 2000
Posts: 10,340
Likes: 664
From: Beverly Hills (Pine Ridge) Florida
You can use a standard 9 Volt battery, rather than a 12 Volt (as long as you don't leave the big battery disconnected for longer than necessary.
Plasticman
Thread Starter
Melting Slicks
Joined: Aug 2004
Posts: 3,078
Likes: 101
From: Riverhead New York
You don't "have" to, but it sure is a good idea. The problem is the ECM will be "reset", and will have to relearn all over again. Some vehicles may lose the presets on the radio, etc.
You can use a standard 9 Volt battery, rather than a 12 Volt (as long as you don't leave the big battery disconnected for longer than necessary.
Plasticman
You can use a standard 9 Volt battery, rather than a 12 Volt (as long as you don't leave the big battery disconnected for longer than necessary.
Plasticman
Burning Brakes
Joined: Oct 2006
Posts: 789
Likes: 10
From: Las Vegas NV
Make sure you know your radio security code before you begin if you completely disconnect without a temp power source.
Team Owner
Joined: Oct 2004
Posts: 23,831
Likes: 10
From: Springfield MO
St. Jude Donor '07
Depends on the vehicle - some have capacitors in the computer which maintain settings for a while even if the battery is disconnected. My '00 Cherokee does this, if you actually want to dump the computer memory you have to do a weird dance involving disconnecting the battery and playing around with the headlight and ignition switches.
