alternator help - BMW Luxury Touring Community
 
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post #1 of 11 Old Oct 23rd, 2011, 12:46 pm Thread Starter
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alternator help

Hey all;

Need some quick help. Does the blue wire that connects to the alternator also tell the battery light on the dash to come on? I know it tells it to charge. I completed the clutch install and everything seems to work except for the alternator, which i also changed. But the battery light "never' comes on. It should when you turn the key on and go off when the engine starts.
Ideas.
Wanted to ride to work tomorrow, well we will see. Im going back in to see If I see something obvious.
Thanks

45 years riding and still more places to see.
2002 K1200LT
2016 R1200RT
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post #2 of 11 Old Oct 23rd, 2011, 2:23 pm Thread Starter
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Re: alternator help

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Originally Posted by Zeke
Hey all;

Need some quick help. Does the blue wire that connects to the alternator also tell the battery light on the dash to come on? I know it tells it to charge. I completed the clutch install and everything seems to work except for the alternator, which i also changed. But the battery light "never' comes on. It should when you turn the key on and go off when the engine starts.
Ideas.
Wanted to ride to work tomorrow, well we will see. Im going back in to see If I see something obvious.
Thanks

Hey again;

Is there another way to "excite" the alternator.

45 years riding and still more places to see.
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2016 R1200RT
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post #3 of 11 Old Oct 23rd, 2011, 3:55 pm
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Re: alternator help

Quote:
Originally Posted by Zeke
Hey again;

Is there another way to "excite" the alternator.
Show it dirty generator pictures. (Sorry couldn't resist).

The blue wire goes through a bulb(in the dash) that is tied to switched power. It also goes to pin 9 on the diagnostic plug.

You could find a small bulb and tie one end to the battery and the other to pin 9 on the diagnostic plug.

John
2009 K1300GT Red Rocket
2009 R1200GS (Gone)
2005 K1200LT Ocean Blue Blue Wizard 110 K and counting...
2006 Bushtec Turbo+2 Spell
2004 330 Ci Convertable
K4AN

Have ridden a Motorcycle in all 48
But lack DE, MA, RI and CT with the 2005 LT

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post #4 of 11 Old Oct 23rd, 2011, 5:17 pm
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Re: alternator help

Pull the little wire from the alternator, ground it, turn on the ignition and see if the light comes on. If it does not, then there is a problem in the bulb circuit. If it does, then there is a problem with the brush/slip ring circuit in the alternator.

Use another bulb, wire from battery positive to the bulb then bulb to alternator where the small wire connects. If the bulb lights, then the alternator should charge when you start the engine.

I don't want to achieve immortality through my work...I want to achieve it through not dying.

David Shealey
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post #5 of 11 Old Oct 23rd, 2011, 5:50 pm Thread Starter
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Re: alternator help

Thanks guys;

I will try it tomorrow. i guess its the train tomorrow, really sucks.
I will post dirty alt pic later.LOL
It just sucks to do all the hours of work and one little wire can stop you in your tracks.
I will let you know.

Zeke

45 years riding and still more places to see.
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2016 R1200RT
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post #6 of 11 Old Oct 30th, 2011, 3:53 pm Thread Starter
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Re: alternator help

Hey again;

Well 2 alternators later from different sellers and still an issue. Now I get the light but no charging. Im going to get a 12v bulb from work and try to "jump" it. Its hard to believe 2 bad alt from different sellers. i must be missing something.
Any help will be appreciated.

thanks all.

train AGAIN.

45 years riding and still more places to see.
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2016 R1200RT
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post #7 of 11 Old Nov 1st, 2011, 6:30 pm Thread Starter
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Angry Re: alternator help

hey guys;


Well checked all the wires i could reach, cleaned them and the connection points.
And no joy in mudville. Light comes on from blue wire and no charge, tried all the way up to 6k rpm and no change in voltage and light never goes out.. So Im going to take the first ebay alternator to the auto shop for a check and see what happens.
Buyer beware. Unless you fine folks have an idea, the engine comes down again.x3
Ba hum Bug.

45 years riding and still more places to see.
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post #8 of 11 Old Nov 14th, 2011, 9:01 am
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Re: alternator help

Zeke,

What is the latest on your alternator problem...I hope you have it resolved now.

Ron


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735,834 miles on touring motorcycles since 1990

IBA 45658 MOA167437

2000 LTC 90,600 miles KIA (new)
2003 LTE 164,188 miles Silver (Purchased with 1687)
2008 R1200RT 176,196 miles (Purchased with 16458)
2017 R1200RT 84,612 miles (new)
Total BMW miles 497,451
1982 GL1100 rode 84108 miles (bought with 12012 sold 96120)
1988 GL1500 rode 12067 miles (bought with 19893 totaled 31960)
1989 GL1500 rode 142208 miles (bought with 20302 sold 162510)
Goldwing miles 238,383
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post #9 of 11 Old Nov 14th, 2011, 3:44 pm Thread Starter
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Smile Re: alternator help

Sorry guys had to recoup from the frustration. Well I took the first "bad" alternator to the shop and the guy took the brushes out and reseated them. I dont know what that means, just telling the story. Checked it and it was perfect, would push out 21v. So I dropped the engine again, pretty good at it now, about 1 1/2 hours. Installed and checked and all is good. She runs absolutely perfect. Ran her up to 110, runs smooth as silk. I installed the new siebnerock clutch. Hard to tell the difference because I had the other one for 218k miles. But she sure is smooth, almost feels like shes slipping but "not". Once I felt good, i redlined her thru 3 gears and the front end was a little light every shift.
So all is well. I guess I was too stubborn to believe I got 2 bad alt from 2 vendors but it happens.
Thanks to all that helped and listened to my rants. No left over parts, wow.
I have a good used plate with 1mm left on her, for sale cheap. LOL
Well thanks again, Im going riding.

Zeke

45 years riding and still more places to see.
2002 K1200LT
2016 R1200RT
IBA # 41935
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post #10 of 11 Old Nov 14th, 2011, 4:24 pm
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Re: alternator help

Great news that you are up and running again...now I don't have to worry about passing you up with mileage LOL.

I just replaced a kitchen faucet 2 times because the first new one leaked. I feel your pain.

Enjoy the ride!

Ron


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735,834 miles on touring motorcycles since 1990

IBA 45658 MOA167437

2000 LTC 90,600 miles KIA (new)
2003 LTE 164,188 miles Silver (Purchased with 1687)
2008 R1200RT 176,196 miles (Purchased with 16458)
2017 R1200RT 84,612 miles (new)
Total BMW miles 497,451
1982 GL1100 rode 84108 miles (bought with 12012 sold 96120)
1988 GL1500 rode 12067 miles (bought with 19893 totaled 31960)
1989 GL1500 rode 142208 miles (bought with 20302 sold 162510)
Goldwing miles 238,383
kellenbenz is offline  
post #11 of 11 Old Nov 14th, 2011, 4:29 pm Thread Starter
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Talking Re: alternator help

Sometimes that worse, you're on your back plus the twist oh yipee.
Just take a ride here for dinner and you will be closer in miles to me. I promise I wont ride till you get here. Cross my fingers. lol
Enjoy your new faucet.
Keep the rubber side down.

Zeke

45 years riding and still more places to see.
2002 K1200LT
2016 R1200RT
IBA # 41935
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