Dead battery? - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > General Jeep Discussions > General Jeep Discussion

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 07-10-2013, 04:44 PM   #1
Cape Fear Finn's Avatar
Join Date: Jun 2013
Location: Wilmington NC
Posts: 82
Dead battery?

I know this question has been beaten to death but I need a second opinion so I can sleep tonight. My 2002 TJ will not crank. The gauge blink and the needles jump all around. The battery is reading 12.4 volts but when trying to crank it drops to 6.8 volts. It returns to over 12 after you stop trying to start. Everything I read says bad battery. It has been lazy starting since I bought it a month ago and the battery is at least a couple years old.

Cape Fear Finn is offline   Quote Quick Reply
Old 07-10-2013, 04:50 PM   #2
Radioman's Avatar
Join Date: Dec 2011
Location: Roseville, CA
Posts: 113
Your problem very well could be the battery but before taking it in to be load tested or replaced, I would make sure the connections at the battery are clean and tight. I would also make sure the same is true for the battery connections for the vehicle ground and to the starter.

Having said all that, a battery voltage less than about 9 volts will not start your Jeep.

Good luck

Radioman is offline   Quote Quick Reply
Old 07-10-2013, 05:54 PM   #3
Supporting Member

WF Supporting Member
JimsJeep's Avatar
Join Date: Feb 2012
Location: Long Branch NJ
Posts: 1,278
You should be reading about 13 to 14 volts on a fully charged battery, 12.4 is on the low side
JimsJeep is offline   Quote Quick Reply

Quick Reply

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

» Featured Product

All times are GMT -5. The time now is 10:55 AM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC