Hooked up battery tender BACKWARDS! - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 17 (permalink) Old 03-10-2014, 02:24 PM Thread Starter
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Red face Hooked up battery tender BACKWARDS!

I hooked up the battery tender to my 220 cca Manga Power AGM battery backwards (ie the power and negative were swapped) and when I attached the negative cable last(with the 1.5amp schumacher charger already plugged into the wall) there was a big spark from the negative terminal.... Now my charger says it's charing the battery but displays no information about the charge level and condition of the battery. Could I have fried the battery? Im keeping it on the charger for a few days to trickle and see if I can get anything from it... Let me know your thoughts and I'll answer any questions to aide in this matter. Thanks VN750!

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post #2 of 17 (permalink) Old 03-10-2014, 02:28 PM
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Should be ok.may have done damage to the charger though.see if it holds a charge

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post #3 of 17 (permalink) Old 03-10-2014, 02:38 PM
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Ah, I see now. It's a Schumacher. "Battery Tender" is a brand name, and all of their chargers have reverse polarity protection to guard against what you just did.

Would think you fried the charger more than the battery (unless it was hooked up that way for awhile)

Might be a good idea to get yourself a new charger.
(I suggest the Battery Tender brand... )

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post #4 of 17 (permalink) Old 03-10-2014, 05:01 PM
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Yep, the battery is probably fine but you fried some of the circuitry in the charger.

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post #5 of 17 (permalink) Old 03-10-2014, 08:40 PM
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Quote:
Originally Posted by Knifemaker View Post
Ah, I see now. It's a Schumacher. "Battery Tender" is a brand name, and all of their chargers have reverse polarity protection to guard against what you just did.

Would think you fried the charger more than the battery (unless it was hooked up that way for awhile)

Might be a good idea to get yourself a new charger.
(I suggest the Battery Tender brand...
)
x2


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #6 of 17 (permalink) Old 03-10-2014, 09:22 PM
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I use a Schumacher also, and supposedly, if hooked up in reverse, will stop any current from going thru, and warn you. Wasnt about to test their claims though...



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post #7 of 17 (permalink) Old 03-10-2014, 09:34 PM
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By accident I hooked up the battery backwards on a antique outboard I was working on, just for a second. Did nothing to battery, but it did let the smoke out of the R/R. Might want to check that.
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post #8 of 17 (permalink) Old 03-10-2014, 10:45 PM Thread Starter
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Luckily the battery was off the bike and only connected for a second to the charger. Amazon it is for a new charger and volt meter. Thanks for the insight gents... safe riding

2000 VN750(A16)
*Richmond, Va*

25,000 Miles
Jetted, Shaved, Coastered
New Petcock
New Fuel & Vacuum Lines
New Plugs
Spline Lube
ACCT to MCCT
New Oil in Final Drive
Acid & Naval Jelly'd Gas tank
Luggage Rack
Hard Saddle Bags
Extended b*%ch Seat

(time for a new rear tire and state inspection)
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post #9 of 17 (permalink) Old 03-11-2014, 12:08 AM
..have a vulcan good day!
 
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Quote:
Originally Posted by FoolAmI View Post
Yep, the battery is probably fine but you fried some of the circuitry in the charger.
Most likely the reverse current installed Diode


'86 VN750 13,700 mi -Stock
-Purchased 2008 w/8800mi
Replaced ALL Cables . Kuryakyn LED Voltmeter
SilverStar Ultra 9003/HB2 H4 Headlamp, Jardine Fwd Controls,
Iridiums DPR7EIX-9 & Wires, Tuxedo Mod, Coil Mod, P/U Sensor Mod, Fork Seals,
Splines Lubed - 11/4/2012 - MF AGM Battery
Additional Flashing LED Brake Light on Trunk
Dampers went out @ 13+K !
After TOC MCCT's..... so amazingly quiet I discovered a rattling heat shield on my stock exhaust !
...have a vulcan good day!
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post #10 of 17 (permalink) Old 03-11-2014, 04:10 PM
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So much for reverse polarity protection.....any decent brand has it and it works.
then again, you should leave the charger UNPLUGGED from the wall until you have made your battery connections.
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