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Old 08-30-2015, 04:47 PM
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Battery drain

Has anyone had a battery drain problem 2002 grand cherokee 2.7 crd overland

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Old 08-30-2015, 07:57 PM
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Re: Battery drain

Welcome to the garage.
You are posting in the WK section, you have a WJ.
Never had this problem myself, but helped an other to solve it.
You will have to put a DVM (digital voltmeter with 10A capability) between the battery terminal and the terminal clamp. Now dont mess with doors, because opening or closing a door will awake the BCM and increase the drain. It can take 20 minutes before all units are in sleep mode and the current draw should be the lowest. Now remove the fuses from the PDC under the hood one by one, until you see a large drop in the current draw. Than with the fuse number, we can see which units are connected to it.
After the 20 minutes, still some memories from units are fed, but the current should not go over 100 mA.
Be aware that a bad battery can give the impression that it drains quickly, while its just not holding the charge. So a battery test would also be on my list.
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