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Battery Discharging Rapidly 97 X100

 
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Old 03-05-2019, 08:11 PM
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Default Battery Discharging Rapidly 97 X100

Need help,something is draining my battery. It wont drain while parked checked voltage after sitting all night drops down to 9 while driving then creeps up and then down so I know its charging,checked starter connections. Bought new ground strap polished ground connections,checked everything in the trunk. Battery tested it's fine. All fuses checked. Also when battery is charged the car starts slowly then you do it again it starts fine. I've looked through the forums nothing quite like this. I've never seen a car drain a battery this fast.And my OBD port quit communicating so no codes. Any help you could give me would be much appreciated.
 

Last edited by Mike Lore; 03-05-2019 at 08:13 PM. Reason: Left something out
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Old 03-05-2019, 09:29 PM
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Put a VOM between the pos cable and the pos batt terminal, set it to amps. Check reading. If its over about 50 milliamps, you have a high drain. Start pulling fuses one by one until the drain stops, that is the circuit to check.
 
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Old 03-06-2019, 07:45 AM
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The "usual" problem is the little trap door in the ignition key hole. If it stays stuck open, the car thinks the key is still ignition and does not shut down. You need to lubricate this trap door to make sure it closes every time. Resist the urge to use graphite as it can stain the key and then your pants pockets. A silicone spray might be a good start. To my knowledge, this leads to a slow drain, it may not be enough to explain the faster drain you are describing. Unless the battery is old and a small drain quickly kills whatever margin you have left.

Best of luck, keep us posted.
 
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Old 03-12-2019, 07:48 PM
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Thanks again for the information it helped a lot. It was the alternator to starter wire. I missed it the first time I checked.
 
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