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Unread 03-17-2006, 12:56 PM   #1
swebilius75
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battery wont hold charge any suggestions

battery connections are clean, when jump started shows voltage at 14, just drove it for an hour and is dead again

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Unread 03-17-2006, 01:00 PM   #2
xray
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If the alt is charging then it most likely the battery. How old is it?
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Unread 03-17-2006, 01:03 PM   #3
Matt Gertsch
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Have the battery load tested. If it test good, your alternator is bad.
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Unread 03-17-2006, 01:05 PM   #4
swebilius75
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just bought the battery 2 months ago
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Unread 03-17-2006, 01:06 PM   #5
Matt Gertsch
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That doesn't matter. Have it load tested.
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Unread 03-17-2006, 01:22 PM   #6
swebilius75
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I will try that once I can get a buddy to jump start me again, im glad to hear nothing about starters. Hope this isnt the start of a lot of things, going out to colorado for a last hurah in the jeeper. It has 230,000m under the hood and dont know how much longer it will love me.
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Unread 03-17-2006, 01:24 PM   #7
fryed_1
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Uhh... pull one of the batt cables while it's running. If it dies then the alternator is most likely dead.
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Unread 03-17-2006, 02:11 PM   #8
91xjgawes
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like fryed 1 sayd, take off one of the cables, it will tell you if you need a battery or an alternator
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Unread 03-17-2006, 02:14 PM   #9
swebilius75
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i will try once i can get a jump, kinda stuck at work for now.
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Unread 03-17-2006, 04:34 PM   #10
swebilius75
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well alternator works, im off to get it load tested.
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Unread 03-18-2006, 01:33 PM   #11
youngwon22
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Here's the real answer : Fill the battery up with distilled water, go to Pepboys or wherever and have it quickly chared & tested, then re installed the battery and...viola!
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Unread 03-18-2006, 02:24 PM   #12
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You do NOT want to disconnect the battery cable while it's running. The battery helps with voltage regulation. It's kindof a giant capacitor which helps the voltage remain at 14 and stable. With no battery on, your voltage will go above 14vdc. A lot of your sensors are not designed for 16-18 volts and can be damaged, particularly the computer.

Check the battery voltage when it sits there, jeep off: 12.8(ish)
Check the battery voltage when the jeep is running: 14(ish)
Check the alternator voltage (post regulator) when the jeep is running: 14(ish)

Check the alternaor voltage with battery disconnected, it is quite high... the batter pulls it down to a happy medium.

That stunt is OK on old vehicles, not anything with a computer. (unless you are OK with misc. component failiure.

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Unread 03-18-2006, 02:51 PM   #13
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Quote:
Originally Posted by CODE
You do NOT want to disconnect the battery cable while it's running. The battery helps with voltage regulation. It's kindof a giant capacitor which helps the voltage remain at 14 and stable. With no battery on, your voltage will go above 14vdc. A lot of your sensors are not designed for 16-18 volts and can be damaged, particularly the computer.

Check the battery voltage when it sits there, jeep off: 12.8(ish)
Check the battery voltage when the jeep is running: 14(ish)
Check the alternator voltage (post regulator) when the jeep is running: 14(ish)

Check the alternaor voltage with battery disconnected, it is quite high... the batter pulls it down to a happy medium.

That stunt is OK on old vehicles, not anything with a computer. (unless you are OK with misc. component failiure.

DaveH.
Beat me to it. Don't disconnect your battery cable while the car is running.
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Unread 03-18-2006, 05:25 PM   #14
swebilius75
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thanks but too late, didnt seem to burn the computer up but did get a little smoke from the dash from my stereo. kinda scared to go drive. but yes I did do all the test with voltage and it did turn out to be my starter. new one is on and starts like it was new. just wish smoke didnt come out of my dash.
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Unread 03-19-2006, 07:56 PM   #15
fryed_1
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didn't know that. I've done it quite a few times with no problems... :shrug:
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