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Buell Forum » Knowledge Vault (tech, parts, apparel, & accessories topics) » Troubleshooting (Poor Starting/Running/Handling/Ride Issues) » Archive through May 13, 2012 » 2008 XB12 « Previous Next »

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Ezblast
Posted on Saturday, November 19, 2011 - 02:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Fan fuse keeps on blowing - what is up with that? How do I prevent that from happening, and what is happening?
EZ
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Terrys1980
Posted on Saturday, November 19, 2011 - 02:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Is the fan fuse just blowing when you turn on the bike or is the fuse blowing when the fan kicks on?
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Ezblast
Posted on Saturday, November 19, 2011 - 07:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
When the fan kicks on - starts running.
EZ
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Terrys1980
Posted on Saturday, November 19, 2011 - 08:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Remove the seat and disconnect the fan connector.

On the wiring harness side measure the resistance from pin 4 to ground. If it is anything but infinite, you have a short.

On the fan side measure the resistance between yellow/brown and black. If it is less than 1 ohm the fan needs to be replaced.
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Terrys1980
Posted on Saturday, November 19, 2011 - 08:43 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Also check to see if the fan spins freely.
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Ezblast
Posted on Saturday, November 19, 2011 - 11:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Thanks - will do. - Hey Thomas!
EZ
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2008xb12scg
Posted on Wednesday, November 23, 2011 - 02:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Thanks Ed! The fan spins freely. Now if only somebody could show me how to measure the resistance..He Ed! lol
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Ezblast
Posted on Thursday, November 24, 2011 - 03:33 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
LOL - then answer your phone darn it - lol
EZ
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2008xb12scg
Posted on Saturday, November 26, 2011 - 12:58 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
let the bike idle and fan doesn't come on until I turned it off. fan came on and spins good but blew the fuse after a few seconds. ideas?
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Terrys1980
Posted on Saturday, November 26, 2011 - 01:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
There is really only two things it could be, a bad fan or a chaffed wire.

Too bad you can't use a fan from the 1125. There are about a dozen on ebay for $25.
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2008xb12scg
Posted on Saturday, November 26, 2011 - 02:02 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
thanks Terry, there isn't any kind of temp. sensor that I should look at? or relay? so if the fan comes on for a few seconds spins freely then the fuse blows would it be more likely the fan? cuz the fuse didn't blow until the fan came on..
BTW thanks Terry!!
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2008xb12scg
Posted on Saturday, November 26, 2011 - 02:09 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
just called HD they want 152 for a fan, don't mind doing that but don't want to replace it and find out that wasn't the problem lol
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2008xb12scg
Posted on Saturday, November 26, 2011 - 02:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
is the temp sensor in the fan?
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Terrys1980
Posted on Saturday, November 26, 2011 - 02:27 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
The only relay in the circuit is the key sw relay that powers the whole fuse panel.

The head temperature sensor is a single wire that goes back to the ECM.

I'm working on a drawing.

(Message edited by TerryS1980 on November 26, 2011)
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Terrys1980
Posted on Saturday, November 26, 2011 - 02:36 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
This is the fan circuit. Your bike is an 08 so the wire color might not match.


Fan Circuit
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2008xb12scg
Posted on Monday, November 28, 2011 - 05:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)
Thanks Tery! It sounds like just changing the fan might be the best bet. The ones on ebay are almost new price so ill give asb a call today.
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