Battery drain - JeepForum.com
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post #1 of 14 Old 08-08-2020, 03:17 PM Thread Starter
Glastron1
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Battery drain

2005 Jeep Liberty Limited
Original owner
136 K miles
all oem electrical

April of this year I went out to start it and battery was dead. With portable battery booster it would not start. So I put a new Interstate battery in it and it has been fine since till this week.

With Covid it is not a daily driver but still gets run a couple times a week.

This week I ran it twice. Went out to start it for a third trip (differnt days) and would only click. Also would not jump with protable booster. Put it on a slow charge for a day and it started right up. Ran it over to the local auto parts store and they tested the battery and system. Both seemed to be good.

So it appears I have something electrical draning the battery. Curious if anyone else out there had this issue with their Liberty? Hoping to get a short list of where to look.

Thanks,

Mark

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post #2 of 14 Old 08-08-2020, 04:08 PM
jtec
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thoughts -
look at a drain thru alternator.
Nothing plugged into DLC or power outlets.

When I see the price of OEM I think aftermarket.
When I see the quality of aftermarket I think OEM.
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post #3 of 14 Old 08-08-2020, 05:04 PM
kueh
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A few times that this happened to me, it turned out to be dirty battery terminals.

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post #4 of 14 Old 08-09-2020, 07:17 AM
Brad426
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With a fully charged battery I would do a battery draw test.

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post #5 of 14 Old 08-09-2020, 02:38 PM Thread Starter
Glastron1
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Used a multimeter on the battery last night. It read 12.80 checked it again thsi afternoon and still reading 12.80.

Yesterday I checked for a draw from the car by switching the positive lead on the multimeter to the 10 amp connection port and disconnecting the negtave terminal on the battery to bridge the current through the miltimeter. (long sentence). Anyway the reading stayed at zero. As evidenced by battery holding the charge overnight I'm not sure what is going on.

Did clean the connections to the terminals with a wire brush. They looked clean but why not....

Will keep an eye on this . Maybe a door was not shut all the way? IF I figure ti out I'll post on this thread again.

Thanks for the suggestions.

Mark
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post #6 of 14 Old 08-09-2020, 09:44 PM
kueh
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Oh. Starter points are possibly worn, or whatever they're called.

Oops. Wouldn't explain the drain, just the click and no start.

I drained my battery a couple of times by leaving a cabin light on, accidently.
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post #7 of 14 Old 08-10-2020, 09:40 AM Thread Starter
Glastron1
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I went out again today and checked the battery. Did not drive the jeep yesterday. Battery was down to 12.78 I'm taking it over to another parts store to check the system today. If they don't find anything I'll get a new volt meter and see what it reads with another draw test.
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post #8 of 14 Old 08-10-2020, 12:09 PM
Brad426
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0.02 volts is nothing to worry about.
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post #9 of 14 Old 08-11-2020, 08:53 AM Thread Starter
Glastron1
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today it is down to 12.71
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post #10 of 14 Old 08-11-2020, 02:34 PM
Brad426
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They all drain power when sitting under normal operation. You need to be interested in amps. not volts. If it is going to sit for extended time. Disconnect the battery.
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post #11 of 14 Old 08-12-2020, 06:23 AM
Erem
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Hi,
Will you please check if your key can be pulled out on ACC position? Some worn locks let the key out and that drains the battery whole night.

2002 2.7 CRD
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post #12 of 14 Old 08-12-2020, 10:01 AM Thread Starter
Glastron1
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Jut reading volts to see what the daily drop is. This morning it reads 12.66. Key is out. Had done a draw test with my Fluke series 75 multimeter a couple days ago. Today I looked into this again. This time I opened door to get a drain with the interior lights. Still reads zero. Looks like the fuse on my multimiter needs replaced. So ordered two new fuses. That explains the daily drop in battery volts and lack of a draw when I test for it. Will test again when I get them. Sorry Iwasted your time bouncing this off you all. Looks like my mutimiter was off...
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post #13 of 14 Old 08-13-2020, 04:06 PM Thread Starter
Glastron1
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got the fuse in today. Meter now gives me reading past 0.00 when checking 10 amp mode...

with doors shut and key out of ignition we get a reading of 0.25 dc
pull the fuse out of cavity #34 and rading drops to 0.00 - 0.01
This cavity is for body control module/interior lights/ hands free module/ radio....etc

It is stock radio but my best guess is that the radio is the issue.

Will keep you informed
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post #14 of 14 Old 08-13-2020, 07:59 PM Thread Starter
Glastron1
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Location: Sterling
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pulled stock radio out and checked drain at battery. still 0.25 dc
I noticed an old motorolla hands free kit Best Buy installed this years ago. Never use it
removed it and retested at amp draw at battery. Drain in down to 0.15-0.16 dc with keys out of ignition and all fuses in.
reinstalled the stock radio. Test still shows 0.15 - 0.16
Walked away from Jeep for 10 minutes with volt meter connected between negative terminal and negative terminal clamp.
Came back 10 minutes later. draw was reading 0.01
Looks good now and did not have to replace the radio
Thanks for all the suggestions.

Last edited by Glastron1; 08-13-2020 at 08:33 PM.
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