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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Electrical - Battery, Charg Sys, Lights, Switches, Sensors & Guages » Archive through October 14, 2011 » Voltage Regulator Problem « Previous Next »

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Andrewlind87
Posted on Thursday, August 25, 2011 - 11:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

XB9SX 09, 8k miles.

Started having check engine light come in with intermittent power drops. Diagnostics trouble code 16, low/high battery voltage. I did a ride with a multimeter connected to the battery terminals.

Voltages were as follows
Prior to start: 12.61
After start: 14.10
Running/Riding: 14.25
During fluctuation/problem: ~11-13
Lowest: 10.86
After Shutoff: 12.88

I have been told this is a voltage regulator problem. How do I fix this?
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Terrys1980
Posted on Thursday, August 25, 2011 - 11:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Did you read the last post in your other thread from Harleyelf or verify the voltage coming from the stator?

Connector #5 is the one you will need to check alternator/stator output.
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Andrewlind87
Posted on Thursday, August 25, 2011 - 11:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have just pulled off the left air scoop and checked the VR cables and connectors. I am not sure where on the engine this picture is. My manual doesn't have an alternator connector listed in it. there are two connectors coming of the VR, one that goes to the stator and another that goes to the battery. Which one am I supposed to check?
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Froggy
Posted on Friday, August 26, 2011 - 12:44 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

The picture above only applies to older XB models, your 09 has a totally different wiring harness.
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