04-23-2021, 12:02 AM | #1 |
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Waking her from a Covid induced coma
Hey guys,
Hoping to get some guidance/help with an issue I'm having. It's a 2016 340i xdrive and it's been parked for most of covid outside of us moving back in January. When I attempted to drive it the morning of the move I had to jump it with another vehicle and was getting a msg to drive the car as the battery needed power. Since moving I've put it in storage. I attempted to move it a couple days ago and it wouldn't respond to the fob. Used the blade to open it and everything was dead. I ordered a Noco Genius5 which came today and at around 230 pm I hooked it up directly to the car terminals n left it charging with the hood open as I only had the clamps. I noticed before leaving it to charge that the hazard lights where flashing (faint tho) tried to turn the hazards off in the car but it wasn't working. In about 30 seconds the hazards stopped flashing and it left it to charge. Just now around 12am I wanted to disconnect it as I didn't want to go to sleep with it charging. Walked into th garage to see the hazards flashing brightly. I removed the battery charger the opposite way I put it on, closed the hood... and the alarm went off. Ran for the fob and it wouldn't respond, tried the spare and the same thing... No response used the blade tried starting it... nothing. So the alarm is blaring disturbing the neighbors. While i was frantically trying to figure out how to stop it (googling). At some point I looked again and the light were faint. Went back to try searching and eventually it stopped (thank God) I'm gonna give it another shot tomorrow morning. How do I turn off the alarm if it goes off on me again? Is there any way I can get the battery to charge without the hazard lights coming on? How do I know if the fobs batteries are good? Did I do anything wrong on the steps I took? Please let me know if you need any additional info Thanks for your time |
04-23-2021, 01:13 AM | #2 |
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Drives: 2018 BMW 340i M Sport
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Location: Chicago (Edgewater via Tennessee & Texas)
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Based on the lights being faint again after having charged the battery for about 10 hours I would guess it’s not holding a charge and will need to be replaced. These cars do strange things when their batteries have low voltage. If the fob batteries are okay and the fobs are working the door locks should respond when you have the battery on the charger. I would think.
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04-23-2021, 08:29 AM | #3 | |
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The hazards were bright when I walked into the garage but after it alarming for maybe 10mins the alarm stopped and the lights were dim again |
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04-23-2021, 08:39 AM | #5 |
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Drives: 2016 340i X Drive
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I would disconnect the battery and charge it directly to see if it holds a charge.
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04-23-2021, 08:45 AM | #6 |
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Might be worth it to invest in a proper CTEK charger that you can leave plugged in to the car. For months even.
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wilbur_the_goose350.00 |
04-23-2021, 10:46 AM | #7 |
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Let the NOCO do it's thing. It's only a 5 amp charger, so to fully charge a dead 95 amp hour battery will take a minimum of 19 hours. Before jumping the gun and buying a new battery that you may not need get one of these and follow the directions on how to check your battery function: https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
In the future put the car on the tender if you're not driving it for two weeks or more in summer. In winter mine's on the tender most of the time, as I tend to drive only once a week and then less than a half hour. |
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04-24-2021, 05:50 AM | #9 | |
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As for the key fobs, might as well replace the batteries if it’s been over a year or two. They’re cheap and by the time it takes you to break out the multimeter to check them you could have been done replacing the batteries. |
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Wires1840.50 |
04-24-2021, 06:59 AM | #10 |
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All great advice guys thanks alot.
Re removing the battery to charge directly. Currently it's dead so I'm guessing I'd have to look it up as is then get some juice n then open the trunk to remove the battery. Will I have to reprogram the battery if I remove it to charge it? And how do I reprogram it?? |
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04-24-2021, 07:42 AM | #11 |
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Charging the battery directly will increase the charge rate, but only very slightly, not enough to make it worthwhile. Put in on the charger in the normal fashion, connected to the charging posts under the hood, leave it for a full day. Make sure that you lock the doors, using the mechanical key if necessary, which shuts down any potential power drain.
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04-24-2021, 07:58 AM | #12 | |
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04-24-2021, 12:36 PM | #13 | |
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THIS! |
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05-09-2021, 04:54 PM | #14 |
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hey guys,
Finally got the battery charged up! i removed it from the car and left it charging for maybe 24hrs or so. unplugged it a few days and plugged in again to see if it was retaining charge and it was! Just put the battery back in the car yesterday and we are all good now! thanks for all the help guys! much appreciated! |
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340i, alarm triggered, battery agm, hazard lights |
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