Battery light - MVAgusta.net
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post #1 of 59 (permalink) Old 09-23-2018, 10:41 PM Thread Starter
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Battery light

Ive noticed when riding that every now and then my battery light on the instrument cluster will come on. It will stay on for a few minutes at most then go off. Normally this happens just after I've been at a traffic light for a decent amount of time. Is this anything to be worried about and should I be startibg to price an alternator, or is this something that happens with the first gen Brutale? Thanks guys.
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post #2 of 59 (permalink) Old 09-24-2018, 02:04 AM
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From my layman's experience it does sound as if the battery is not receiving enough charge during the low revs/idle phase. First point would be to test the battery terminals and then the charge rate.

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post #3 of 59 (permalink) Old 09-24-2018, 06:40 AM
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That light should not come on. Period. When it does you are being told the charge rate to the battery is low.

Check your battery cables and terminals, especially ground cable and attachment at the engine. Check connections from alternator to the battery/starter relay/main fuse.

It's intermittent, I would not suspect the alternator itself.

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post #4 of 59 (permalink) Old 09-29-2018, 07:19 PM Thread Starter
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Ok, so I check all the connections,the other and everything looked good. Buttoned it back up and away I went. So today I replaced the rear turn signals and front tire. But the bulb for the license plate light broke so I rode to get a new one. The battery light stayed on for the trip and was on on the way home. It had nevwr stayed on for that long beofre. I got the new bulb in and went to start it and nothing. Battery was dead. Hooked up a tender to it and let it charge for a bit and it started again but then the instrument cluster lit up everything, and flashed so I shut it down. Now when trying to start it the battery makes a fast clicking sound. So hooked my brothers battery to it and it fired right up, but the battery light remained on, and his volts dropped to 10 and we killed it. Does this just sound like a dead battery like I'm hoping it is, or something to do with the alternator? I hope it is nothing expensive or complex as this is my only means of transportation.
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post #5 of 59 (permalink) Old 09-29-2018, 09:54 PM
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Although your battery may now be shot (from repeated excessive discharge), your problem is not a bad battery.

Like with a car, one can start a bike with a bad battery with jumper cables, remove the cables and run it normally - as long as the alternator is charging correctly.

The ‘battery’ light is perhaps a bit of a misnomer, and should rather be called an ‘alternator’ or ‘charge’ light. It does not indicate the condition of the battery, but rather the condition of the current being generated by the alternator.
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post #6 of 59 (permalink) Old 09-30-2018, 12:24 AM Thread Starter
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Exactly the same conclusion I came to reluctantly. Gonna pull the alternator off tomorrow and hope I can find a replacement for it on a Sunday. I've read to take the tank off, then the starter, remove some wires, then I should have access to remove it. I was really fearing that it was the alternator, and I am not looking forward to it.
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post #7 of 59 (permalink) Old 09-30-2018, 01:23 AM
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Hi, when the light it's intermittent is a signal of coming bad alternator. So now is intermittent after few days or weeks will become fix light and yuor bike will not run or will stop (if battery it's totally died cause not recharged). First control how many volt is given the alternator and you'll understand if have some problem.
If you need an used alternator in good condition let me know
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post #8 of 59 (permalink) Old 09-30-2018, 01:26 AM
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Originally Posted by tallguyjc View Post
Ok, so I check all the connections,the other and everything looked good. Buttoned it back up and away I went. So today I replaced the rear turn signals and front tire. But the bulb for the license plate light broke so I rode to get a new one. The battery light stayed on for the trip and was on on the way home. It had nevwr stayed on for that long beofre. I got the new bulb in and went to start it and nothing. Battery was dead. Hooked up a tender to it and let it charge for a bit and it started again but then the instrument cluster lit up everything, and flashed so I shut it down. Now when trying to start it the battery makes a fast clicking sound. So hooked my brothers battery to it and it fired right up, but the battery light remained on, and his volts dropped to 10 and we killed it. Does this just sound like a dead battery like I'm hoping it is, or something to do with the alternator? I hope it is nothing expensive or complex as this is my only means of transportation.
Ovvious it's an alternator problem
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post #9 of 59 (permalink) Old 09-30-2018, 05:32 AM Thread Starter
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Misty5, I'm thinking I'll end up having to get an alternator from a forum member. I'll let you know for sure once Ibget it out. Where are ypu located at? I am sure they are not cheap to ship. And you're more,than welcome to PM me a price if you've got one. Thanks.
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post #10 of 59 (permalink) Old 09-30-2018, 08:04 AM
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Okay folks, I am going to throw a booger in the pudding. There are several things that can cause a poor charge condition to show up. ONe of those things is a high resistive load in the circuit...i.e. a toasted battery. Another is poor connections at the star solenoid....which is a known problem with these bikes...yet another is poor grounds.

What I am saying here is to check your system before you go throwing the baby out with the bathwater. The alternator on these bikes is robust.

Yes, it could be a bad alternator, or more likely voltage regulator, but, without checking the simple things, you could just be burning good money.

Test your circuit. Check your connections.
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