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setter91 12-15-2010 08:37 PM

Battery Dying
 
Hope you guys can give me a little help. For the last couple of weeks, the battery on my 06 WK 3.7 needs to jumped. I've taken the battery in when it was dead and it tested fine and held a charge. That would leave me to beleive the alternator was bad. Every time I check the battery it is showing anywhere from 14.3 to 14.7. I took it back to Carmax who had it for 3 days and everything was fine. Any ideas?

Scottina06 12-15-2010 09:06 PM

Re: Battery Dying
 
Quote:

Originally Posted by setter91 (Post 318539)
Hope you guys can give me a little help. For the last couple of weeks, the battery on my 06 WK 3.7 needs to jumped. I've taken the battery in when it was dead and it tested fine and held a charge. That would leave me to beleive the alternator was bad. Every time I check the battery it is showing anywhere from 14.3 to 14.7. I took it back to Carmax who had it for 3 days and everything was fine. Any ideas?


...could be a slow draw? Have you added anything electrical?

robpp 12-15-2010 09:12 PM

Re: Battery Dying
 
i think we have seen this before. the battery TESTS GOOD but it truly isnt GOOD under load. if that the original battery its time for a new one.

thex2 12-15-2010 09:25 PM

Re: Battery Dying
 
Find a local auto shop that'll test your battery, starter and alternator for free. If those all check out, maybe it's corrosion between the battery and the leads? Post back, let us know when you figure it out.

EDIT: actually, if it starts with a jumper every time, then it's something with the battery or connection. Like robpp said, it could be bad when it's under load... depending on what type of battery test has already been done on it, you may already have the answer to that question. If it tests fine under load, then it's probably corrosion between the leads and the battery nipples.

setter91 12-17-2010 08:17 PM

Re: Battery Dying
 
Thanks guys...the battery is less than a year old. In fact it is the second one that was replaced under warranty by Sears. It is to the point now where it only starts with a jump. I'm taking the battery back to Sears in the morning for testing. It they say it's good, back to the shop to figure out...again.

fivespeed6 12-17-2010 11:12 PM

Re: Battery Dying
 
After the additional info about it being the second battery replaced, it looks to be like an issue with your alternator.

And if it is an issue with the alternator, most likely that has ruined the "new" battery to some extent.

Have you tested the voltage with the engine running?

2005JGC 12-18-2010 01:43 AM

Re: Battery Dying
 
Quote:

Originally Posted by fivespeed6 (Post 319618)
Have you tested the voltage with the engine running?

Quote:

Originally Posted by setter91 (Post 318539)
Every time I check the battery it is showing anywhere from 14.3 to 14.7.

;)

its alreadly all pretty much been hit... either another bad battery or you have a draw. I know for a time there was a draw cause by software keeping the sunroof module alive killing the batter... I dont know where that tsb went to to reference.

charge the battery up good, pull the negative battery cable off and use and ammeter from the post to the battery cable... you want the vehicle to fall asleep and be in the .020-.050 or so amps (20-50 milliamps). If it doesnt, start pulling fuses until it drops to where it should be, that will tell you the circuit to trace down and inspect.... or take it to a shop and they will do this all for you ;)


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