What's wrong? Battery/charging system - Stromtrooper Forum : Suzuki V-Strom Motorcycle Forums
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post #1 of 21 Old 07-25-2018, 02:19 PM Thread Starter
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What's wrong? Battery/charging system

2012 DL1000L2 29k miles.

Hopped on the other morning and rode to work, when I got to the parking lot I heard my radar detector say something about "low voltage, shutting down" so I look over the bar at my voltage meter and it reads 9.7v...then a few seconds later 9.6v then 9.4v...ugh. The meter is hardwired to the battery terminals through a fuse.

Original battery still in it, so I figure 6 years is a good life for the original factory battery and buy a new one at lunch. Voltage meter reads 13.9v (guess the battery wasn't *fully* charged from Batteries+ but should still get me home ~50 miles. It does.

However, rounding the corner to my house I check the voltage meter and it reads 14.3v?!? And sitting in the driveway revving the engine it gets up to and stays at 14.4v.....................so now what? Does this mean that a "dead" battery caused the voltage to read so low while it was running? That doesn't make sense to me, the charging system should still put out over 14 volts I'm guessing. Could this have been a fluke and the problem corrected itself? My battery tender has not switched on even overnight -- although it normally does this red-to-green blinky thing every few minutes, I just see steady green.

Do I still need to test the rectifier/regulator system...pull the cover and see if the magnets have moved...etc..etc? Aaarrgh!
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post #2 of 21 Old 07-25-2018, 03:01 PM
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Quote:
Originally Posted by mushu View Post
My battery tender has not switched on even overnight -- although it normally does this red-to-green blinky thing every few minutes, I just see steady green.
I have a battery tender that i rotate btwn three batteries, on a decent battery, it always goes red initially for about 30 seconds (or less) and then goes solid green and stays green for as long as i leave the tender on. Never seen it do a red-to-green blinky thing.
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post #3 of 21 Old 07-25-2018, 03:04 PM
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Last year after I installed a voltmeter, my electrical system was showing about 13.3 - 13.5v. I started it one day ans move it over to the compressor to check the tires and shut it off. It wouldn't start or even turn over again.

Replaced the battery and now the electrical system consistently shows 14.5 - 14.6v so I'd say it was probably the old battery.

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Last edited by OCADVR; 07-25-2018 at 09:18 PM.
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post #4 of 21 Old 07-25-2018, 09:00 PM
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With a bad battery you will never get a true voltage reading and any testing should be done with a fully charged battery.

You need to keep a close eye on things.

I don't know for sure if the 2012 is involved but the 1000 has trouble with the magnets on the flywheel moving, this can make the charge rate fluctuate.
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post #5 of 21 Old 07-25-2018, 10:43 PM
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Agree with the other answers. Your current readings look ok. But keep watching carefully to make sure that there is no deterioration of the operating voltage. As long as you get over 14V I would not loose sleep over the charging system.

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post #6 of 21 Old 07-26-2018, 01:38 PM Thread Starter
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So thought I'd ride to work again this morning after the new battery. Started up fine, showed 14.1 volts, figured I'm set. Halfway to work I glanced at the meter and it was down to 12.1v and then dropped to 12.0v no matter how high I revved the engine. [email protected] So, it appears that the charging system works while cold, and after it warms up it stops charging. Got home at 11v. Thoughts on this anyone?

Last edited by mushu; 07-26-2018 at 07:52 PM.
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post #7 of 21 Old 07-26-2018, 01:47 PM
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I would suspect the stator.

Magnets are encapsulated on these so that won't be an issue.

Regulator/Rectifier problems are rare.
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post #8 of 21 Old 07-26-2018, 03:16 PM
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You said the radar detector is hardwired to the battery, but isn't the end at the the detector still a regular male and female plug connection? If so, isn't it possible that it was slightly or momentarily undone and actually there is no problem with the charging system? Just a plug that came loose?
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post #9 of 21 Old 07-26-2018, 07:50 PM Thread Starter
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Quote:
Originally Posted by richlandrick View Post
You said the radar detector is hardwired to the battery, but isn't the end at the the detector still a regular male and female plug connection? If so, isn't it possible that it was slightly or momentarily undone and actually there is no problem with the charging system? Just a plug that came loose?
No, the voltage meter is hardwired. The radar detector uses a cigarette plug and I use a large rubber band to hold it in to prevent vibrations from slowly working it out. So it is securely connected at all times. The other end is an RJ11 with a little lock tab so it is also secure.
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post #10 of 21 Old 07-26-2018, 09:41 PM Thread Starter
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Okay, so i need some help. Which of these is the "generator coupler" it says to disconnect for measurements in the manual? Attached are images of what I have to choose from, plus the page from the service manual.
Attached Images
File Type: jpeg _IGP3733 (Medium).jpeg (164.2 KB, 10 views)
File Type: jpeg _IGP3731 (Medium).jpeg (217.0 KB, 8 views)
File Type: jpeg _IGP3732 (Medium).jpeg (223.4 KB, 7 views)
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