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BMW 3-Series (E90 E92) Forum
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How to properly hook up battery charger to e90 battery
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08-31-2017, 04:53 PM | #1 |
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How to properly hook up battery charger to e90 battery
Hi guys, i have an e90 B3 thats dead, i currently have a charger running to its battery but after a whole day of it charging car is still completey dead. I have the cables hooked up to the screws that hold the terminal clamps onto the battery in place. Do i need to hook the cables directly up to the battery terminals itself or will them being attatched to those screws still charge the battery. Can i hook the charger to the terminals under the hood? Thanks guys
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08-31-2017, 05:08 PM | #2 |
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The connection are under hood. There's a red cap on positive on passenger side rear of strut tower and negative is a little silver rod that sticks out parallel to the ground about an inch that's front of passenger strut tower
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08-31-2017, 05:41 PM | #5 |
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I would think hooking it directly to the battery is better but then again, the battery is directly connected to the posts under the hood, so maybe it doesn't matter. I was thinking of charging mine as well, since I'm getting the increased discharge warning, just not sure what to dial the trickle charger to, unless a trickle charger won't help...
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08-31-2017, 08:17 PM | #6 |
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Hook up charger to terminals under the hood. I do it all the time and charges as it should
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08-31-2017, 09:02 PM | #7 | |
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08-31-2017, 10:29 PM | #9 | |
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09-01-2017, 12:53 AM | #10 |
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09-01-2017, 05:19 PM | #11 |
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09-01-2017, 07:59 PM | #12 |
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Thank you, the city isn't as bad as the news makes it seem! My house got about 3 inches of water, but i've already cleared everything up. My only fear were the cars lol! I left the b3 at mt moms place as it doesn't flood and for 4 days was stuck at my home. Never lost power for a second though!
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09-01-2017, 08:26 PM | #13 | |
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How much power your b3 makes and curious how you bought it? Get a chance post a pic of the engine bay. Guess its n54?
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09-02-2017, 01:33 AM | #14 |
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Good news, just jumped it and it started right up. Some bad news too as it went into transmission limp mode, i don't know if the battery has a low voltage or if there exists a more serious problem. The car did just have its transmission rebuilt about 3 months ago...wondering if these two issues are connected.
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09-02-2017, 08:20 AM | #16 |
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