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Old 07-09-2013, 06:03 PM   #1
Joeboxer82is OP
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Battery Voltage

I was riding to work earlier when i noticed my voltage went down to 11.7 from 13.4 and e battery light lit up. I had e battery and starter replaced in May. Could it be either e coil or rectifier??

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Old 07-09-2013, 06:15 PM   #2
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I think all of the coil and rectifier are internal to your Bosch type alternator.

likely an easy repair for you, or a local automobile electronics ( starter/alternator type ) shop.

or try here.

http://www.euromotoelectrics.com/category-s/26.htm

I find the site a bit tough to navigate, but the parts are good and priced fair.
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Old 07-09-2013, 08:31 PM   #3
JimVonBaden
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Assuming you have no loose cables, it would likely be your alternator. Easy, if not cheap, fix. (OK, not that easy.)

Jim
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Old 07-09-2013, 08:46 PM   #4
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Can a loose alternator belt cause this?
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Old 07-09-2013, 08:51 PM   #5
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Originally Posted by Jazz62 View Post
Can a loose alternator belt cause this?
It could, though usually you will hear it.

Jim
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Old 07-09-2013, 09:53 PM   #6
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There's no weird or strange sound coming from e alternator. Hopefully it's just some loose wires... I'll be getting it checked later.Mine is a 2001 R1150GS with 222,000km in it. Thanks fellas...
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Old 07-09-2013, 11:08 PM   #7
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Quote:
Originally Posted by Joeboxer82is View Post
There's no weird or strange sound coming from e alternator. Hopefully it's just some loose wires... I'll be getting it checked later.Mine is a 2001 R1150GS with 222,000km in it. Thanks fellas...
If it's not the belt, at that mileage I would suspect the brushes.
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Old 07-10-2013, 01:52 AM   #8
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If it's not the belt, at that mileage I would suspect the brushes.
The mechanic told me that the alternator has to be replaced.Lucky he has a used one... Not cheap though! Btw how much does a brand new alternator cost? I do understand that it's a bitch to take it off from e bike.
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Old 07-10-2013, 06:38 AM   #9
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Do you have any accessory loads running off the voltage lead in the diagnostic plug?

A couple months ago, I had an intermittent voltage drop and battery light flicker problem. I *thought* it was the alternator, but it turns out I had a bad relay coil connected to that voltage lead. When I replaced the relay, the problem resolved itself.
Along the way, I replaced the voltage regulator - if you've got the alternator out now, remove the VR and have a look at the brushes/shaft. My brushes were significantly worn, so I put a new one in on the 'it can't hurt' principle.
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Old 07-10-2013, 08:22 AM   #10
def
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I would remove the front cover and inspect the alternator belt.
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Old 07-10-2013, 10:04 AM   #11
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Quote:
Originally Posted by Joeboxer82is View Post
The mechanic told me that the alternator has to be replaced.Lucky he has a used one... Not cheap though! Btw how much does a brand new alternator cost? I do understand that it's a bitch to take it off from e bike.
Used oilhead alternators are reasonably inexpensive and I have never gotten much for any that I have sold in the past.
Yes they are tedious to remove if the bike has ABS. I have done them.
The unit IS repairable - parts are available from Euromotoelectrics.
Link to a reman one. http://www.euromotoelectrics.com/Rem...w-alt1020r.htm
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Old 07-10-2013, 12:33 PM   #12
def
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Alternators have few wear parts. They are

1- Brush(es).
2- Bearings.

The other part that might require replacement would be the regulator/rectifier. It is very unlikely that the stator windings have failed.

First things first...there is a chance that the drive belt has broken. It is easy to check so, I would go there first.

We're curious so, keep us informed of what you find.

Thank you.
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Old 07-10-2013, 12:47 PM   #13
def
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Quote:
Originally Posted by Joeboxer82is View Post
The mechanic told me that the alternator has to be replaced.Lucky he has a used one... Not cheap though! Btw how much does a brand new alternator cost? I do understand that it's a bitch to take it off from e bike.
"Caution Will Smith...beware of suspicious used alternator salesmen"

"Hey Andy" "Hey Barney. How ya doin"?

"Well Andy, I've got a problem with that car I just bought from that nice little old lady over in Mount Pilot. The battery isn't chargin' like it should" "Well Barn, I would take it over to Guber and have him check the alternator".

"Andy, that car is a 6 volt electrical system and its a generator, not an alternator. Alternators haven't been used on cars yet. Andy, you should know that".

"Well Barney, I was just tryin' to help. Do what you want".
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Old 07-10-2013, 12:50 PM   #14
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Battery Voltage

Wow- That's interesting as I was on a business trip yesterday out in the middle of nowhere and my Battery light came on. I had to meet with a client so was concerned. The bike did start after my 30 min appointment but only 1 ABS light is flashing and my Tachometer quit working. During my return trip, the light went out and the Tach started again for about a minute and then the light was back on Tach off again. I got it home but have not had time to look into it much. Did check battery connections all are good. The battery came up on the trickle charger but still have the same issues. I'm thinking Loose Wire. Going to dive into it tonight. Will take any info from anybody. Thanks.
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Old 07-10-2013, 01:18 PM   #15
def
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Originally Posted by GS/BS View Post
Wow- That's interesting as I was on a business trip yesterday out in the middle of nowhere and my Battery light came on. I had to meet with a client so was concerned. The bike did start after my 30 min appointment but only 1 ABS light is flashing and my Tachometer quit working. During my return trip, the light went out and the Tach started again for about a minute and then the light was back on Tach off again. I got it home but have not had time to look into it much. Did check battery connections all are good. The battery came up on the trickle charger but still have the same issues. I'm thinking Loose Wire. Going to dive into it tonight. Will take any info from anybody. Thanks.
"Hey Andy" "Hey Barney" "Andy, Guber had a look at the wires under the hood. He says, Can't be fixed. Whadda I do now Andy"?

"Well Barn, I'd put an alternator on it".
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