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  #11  
Old 19th July 2016
sportsterdoc's Avatar
sportsterdoc sportsterdoc is offline
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Join Date: Apr 2012
Location: Mojave Desert
Posts: 13,688
Sportster/Buell Model: 1200S
Sportster/Buell Year: 2002
Sportster/Buell Model #2: XLH883
Sportster/Buell Year #2: 2003
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Originally Posted by splineman View Post
I am going to poke around a bit more to check my electrics out, seems vibration may play a part as well with rubbing.
Vibration?!
On a Sportster??!!
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  #12  
Old 15th May 2017
taco taco is offline
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Sportster/Buell Model: xl883 iron
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Thanks sportsterdoc for giving me some ideas on how to fix my sons 2007 custom low. my boy thought his battery was bad (slow cranking)so he replaced battery. lite came on during a short ride a day after, so he stopped by a shop they said vregulator bad replaced, fine for 3 to 4 days, lite is back on when he came over for mothersday. i checked voltage at the battery charger plug , key off 12.6, on12.4 , running 12.2, i told him not charging and i really need a trouble shootin guide. Where to find one? I thought ... let me look here and YOU DID IT !!
Havent used it yet but really thanks for a starting point and what to look for.
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  #13  
Old 15th May 2017
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sportsterdoc sportsterdoc is offline
Senior Master Custom Bike Builder
 
Join Date: Apr 2012
Location: Mojave Desert
Posts: 13,688
Sportster/Buell Model: 1200S
Sportster/Buell Year: 2002
Sportster/Buell Model #2: XLH883
Sportster/Buell Year #2: 2003
Reputation: 6661319
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Quote:
Originally Posted by taco View Post
Thanks sportsterdoc for giving me some ideas on how to fix my sons 2007 custom low. my boy thought his battery was bad (slow cranking)so he replaced battery. lite came on during a short ride a day after, so he stopped by a shop they said vregulator bad replaced, fine for 3 to 4 days, lite is back on when he came over for mothersday. i checked voltage at the battery charger plug , key off 12.6, on12.4 , running 12.2, i told him not charging and i really need a trouble shootin guide. Where to find one? I thought ... let me look here and YOU DID IT !!
Havent used it yet but really thanks for a starting point and what to look for.
Let us know what you find.
The regulator ground should be 0.1 ohm or less.
That should have been checked when the regulator was replaced.
If a new regulator was not a long term fix, then also check the stator:

Measure stator resistance to ground (∞) and stator resistance (0.1 to 0.5 ohm, depending upon system), pin to pin.
22 amp system ~ 0.2 to 0.4 ohms
32 amp system ~ 0.1 to 0.2 ohms

Regulator connector 46 has two black wires to the stator. That is an easy place to check the stator resistance.
Adjacent to it is connector 77 which has two black wires from regulator to connector. On the other side of that connector is a red wire to the battery, through the maxi fuse and a black wire to the harness ground. Check the resistance of the black wire to the battery negative post. Both regulator connectors are in the front, below the oil filter.

This thread was due to a poor harness ground: http://xlforum.net/forums/s....php?t=1891463
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