Does this mean I have a bad battery? - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 7 Old 08-13-2014, 07:53 PM Thread Starter
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Does this mean I have a bad battery?

Alright guys, I'm curious as I'm not super smart with automotive electrical systems yet. The wee wouldn't start this morning. It showed the clock but as soon as I turned the key on, there was nothing on the display and no fuel pump noise. I just checked now that I am back home and the battery shows 12.4 with no load but as soon as I turn the key on, it backs down to about 3.5 and the display backlight and neutral light start flickering. I hooked the jumper cables up to it from my pickup and it fired right up. Does this mean I have a bad battery?

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1999 Honda Shadow 600 (sold)
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post #2 of 7 Old 08-13-2014, 08:09 PM
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Sounds like your battery is failing under load. You could have the battery tested at your local auto parts store and check it under load.
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post #3 of 7 Old 08-13-2014, 08:29 PM
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Or you probably just have a bad battery connexion. At least try to tighten this first.
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post #4 of 7 Old 08-13-2014, 08:29 PM
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A bad battery is most likely. You just checked it under load and it failed.

Pat- 2007 DL650A was ridden to all 48 contiguous states. I didn't quite make it to 17,000 miles on the 2012 DL650A.
Nicknames I use to lessen typing, Vee = 2002-2012 DL1000s. Vee2=2014-2016 DL1000s. Wee = 2004-2011 DL650s. Glee = 2012-2016 DL650s
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post #5 of 7 Old 08-13-2014, 10:00 PM
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Get it running report voltage at about 2500 RPMs
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post #6 of 7 Old 08-13-2014, 10:11 PM
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It will depend where you put the volt meter ?

If you put the meter across the battery cables it could just be a loose connection.

If you put the meter directly onto the batteries posts you have a bad battery.

Always try both points but to test a battery you must measure across the batteries poles.

If the battery starting point is 12.4v and you put a good load on it (lights or stater) it will show a lower voltage _ _. _v

If the battery is good it will recover most of that 12.4v a minute or two after removing the load.

If the battery fails to recover most of the 12.4v starting voltage it is failing and time to think about a replacement.

Most bad batteries will show about 11.2v because of one bad cell.

PS: your battery is like a big sponge and will absorb any power spikes your electrical system may produce.

If you use jumper cables to start the bike from the time you remove the first cable you are putting your bikes electrical system at risk.

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post #7 of 7 Old 08-13-2014, 10:13 PM Thread Starter
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Thanks guys! I just took it in and it was bad. Thats what I was assuming but assuming has gotten me in trouble before

2008 Suzuki DL650
1999 Honda Shadow 600 (sold)
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