charging system problem continues

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eeyore
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charging system problem continues

Postby eeyore » Mon Jan 09, 2012 8:21 pm

Ok, so I have a new battery, about a week old and it looks like its starting to go dead again. I noticed when I started it up this morning that it turned over slow, so just kick-started it throughout the day. Decided to try to start it by starter only tonight and no go, after 2 attempts just about drained the battery, was able to kick-start it and it looks like the alt is working. Notice that when I rev the light get brighter in the higher rpms. I'm thinking it may be the relay, but not sure. I will call the dealer yet again, but want to see what the collective thinks.

Thanks in advance
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Re: charging system problem continues

Postby JohnBG » Mon Jan 09, 2012 8:34 pm

Well the most important thing we need to know is the battery voltage. Drag out a voltmeter and check it, then start the rig again let it run a while or take it for a tide, shut it off again and take another reading, and post the results.

Could be a lot of things...

- Cold weather draining the battery.
- Short in the electrical system draining the battery
- Problem with negative battery terminal grounding to the frame
- problem with the starter
- problem with the alternator
- crappy battery

You can't even begin to diagnose a battery problem without a voltmeter.... :wink:
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Re: charging system problem continues

Postby cdscoot » Mon Jan 09, 2012 8:41 pm

Oh no! :oops:
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Re: charging system problem continues

Postby gobium » Mon Jan 09, 2012 10:42 pm

T. I really think you have a bad ground. Still in town finishing up a job. V

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URAL CT
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Re: charging system problem continues

Postby URAL CT » Mon Jan 09, 2012 10:46 pm

gobium wrote:T. I really think you have a bad ground. Still in town finishing up a job. V

+1 on the bad ground (most likely). Check and make sure battery connections are clean & tight including the ground connection to the motor. Good luck...
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Re: charging system problem continues

Postby Albuquralque » Mon Jan 09, 2012 10:51 pm

Check voltage of at battery with motor off and motor running. Post results.
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Re: charging system problem continues

Postby heindlengineeringural » Tue Jan 10, 2012 8:31 am

I would say that it is a bad ground as well. When we had this bike in the shop and replaced the battery, all was working well, so I would say that we have an intermittent electrical gremlin. The Alt was putting out the appropriate amount of charge at both idle and when @ higher RPM. Check the ground at the trans and at the upper motor mount.
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Re: charging system problem continues

Postby Latguy » Tue Jan 10, 2012 8:58 am

The good news is that the lights get brighter as you rev the engine: something is coming from the alternator! A voltmeter is what's needed to diagnose charging problems, as others have said. Check all yer connections, especially ground, and get a meter and report back. You're well on your way to getting this gremlin in the bag.
When the engine is running you want to see 14+ volts and with the engine off the meter should show 12+ volts at the battery.
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Re: charging system problem continues

Postby edthetermite » Tue Jan 10, 2012 8:59 am

[quote="JohnBG"]Well the most important thing we need to know is the battery voltage. Drag out a voltmeter and check it, then start the rig again let it run a while or take it for a tide, shut it off again and take another reading, and post the results.

Could be a lot of things...[quote="JohnBG"]



"Cold weather draining the battery." - Urban Myth



"While the engine is a bit more difficult to start in the winter, hot temperatures actually cause batteries to lose their charging capacity at a much faster rate - car batteries in warmer climates tend to only hold their charge two-thirds as long as colder climate batteries."

"Batteries do not make electricity; they store it. Therefore, a fully-discharged battery does not gain juice from the ether simply because of an increase in ambient temperature. That said, the myth that warming up a cold battery causes it to work better has some grounding in scientific fact. External cold has a distinct effect on a car battery’s ability to perform: At 80 degrees Fahrenheit, a battery is at its optimum; at 32 degrees, it can only supply two-thirds of that optimum; at 0 degrees, its performance is down to 40 percent. Partially discharged batteries that do not start an engine when extremely cold, therefore, may do so if they are warmed up."
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Re: charging system problem continues

Postby edthetermite » Tue Jan 10, 2012 9:05 am

If your putting close to 14 volts into the battery with the charging system then the battery has what it takes to remain charged properly. As other posters suggested- check your ground(s). Nice and clean and tight.

A battery load tester is an essential tool to own. They will tell you if the battery still has the amps to get the job done.
Ed

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Re: charging system problem continues

Postby gobium » Tue Jan 10, 2012 9:31 am

T. I will be working in Hudson give me call let look at bike together. V

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eeyore
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Re: charging system problem continues

Postby eeyore » Tue Jan 10, 2012 10:40 am

thanks for all the replies.

I will post my testing results. I have a multimeter (thanks Van) but not sure of it can test amps.
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Re: charging system problem continues

Postby gobium » Tue Jan 10, 2012 11:06 am

Just clean your ground connections. You should be good. Then test and post
You could just do the one bolt to trans. You rode your bike all last winter, salt got to connection, and the combinations of copper, metal strap and pot aluminum trans created a chemical reaction.

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Re: charging system problem continues

Postby gobium » Tue Jan 10, 2012 11:36 am

Oh, and other thing, according to some owner's manuel you should clamp your -neg black clamp to engine block when jump start vehicle better practice.
Thats way you can check for good ground. Any opinion out there....tell me if I m wrong.
My BMWs are set up that way.

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Re: charging system problem continues

Postby Carl Hunt » Tue Jan 10, 2012 12:49 pm

I think that the reason for clamping the neg cable to the block is to prevent creating a spark near the battery which in the worst case could cause a battery explosion.
I think that if the cables are connected to the batt/block and you have a battery ground cable connection problem the M/C batt will remain isolated.
The safest thing to do might be to perform a continuity check, with the M/C battery connected and ket off, from the batt neg post to the block and the other ground points and look for any lack of continuity..
Some thing else that might provide an indication of the problem would be to jump to the batt connection at the starter and the block and then perform the alt voltage tests and compare the readings.
Hope this helps.
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