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Buell Forum » 1125R Superbike Board » Archive through November 18, 2012 » Cooling fans won't turn on!!! « Previous Next »

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Theamazingkickstand
Posted on Thursday, October 18, 2012 - 11:17 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Coming home today I noticed the cooling fans wouldn't turn on.
Stuck in traffic after work they were fine. Stopped at the gym. Started bike and rode home on the freeway 2 hours later. Got off the freeway and they wouldn't turn on. Turned off the bike when temp got to 215.
I did a valve adjustment about 800 miles ago. Maybe a wire got pulled or disconnected?
Bike has 26k miles now. First real issue. I have the EBR race ECM.
Can someone hold my hand through checking everything possible in a logical order?
THANKS!!!
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Cataract2
Posted on Thursday, October 18, 2012 - 11:33 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If fuse is good then it most likely is a wire pulled somewhere.
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Sprintst
Posted on Friday, October 19, 2012 - 09:52 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

enjoy the silence! lol
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Theamazingkickstand
Posted on Saturday, October 20, 2012 - 12:48 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have a volt meter and will attempt to start fiddleing in a few hours. Are these run through my racing ECM? Relay? No relay?

Thanks!

Side question. I think the temp light comes on at 230. What temp does damage happen on these?
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Theamazingkickstand
Posted on Saturday, October 20, 2012 - 01:03 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I have a volt meter and will attempt to start fiddleing in a few hours. Are these run through my racing ECM? Relay? No relay?

Thanks!

Side question. I think the temp light comes on at 230. What temp does damage happen on these?
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Zac4mac
Posted on Saturday, October 20, 2012 - 01:34 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Fans are ECM controlled.
fan logic has 2 or 3 speeds, fans run independently.

Fans have their own fuse, no relay.

Z

<edit> ECM varies ground, +12 is direct from fuse block.

(Message edited by zac4mac on October 20, 2012)
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Theamazingkickstand
Posted on Saturday, October 20, 2012 - 01:41 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks. Do you know how to check if the ECM is controlling them correctly?

What does +12 is direct from fuse block mean?


(Message edited by theAmazingKickstand on October 20, 2012)
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Zac4mac
Posted on Saturday, October 20, 2012 - 05:42 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I mean, with the exception of a connector or two, nothing is between the fans and the fuse to 12v.

You should be able to ground the fans and see them run, as they should always have +12 on the yellow-brown wire.
They're just waiting for a ground to run.

If you ground the wrong wire, you'll pop the fuse. : )

Z
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Theamazingkickstand
Posted on Saturday, October 20, 2012 - 06:23 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks!

OK so I took all the bodywork off and jiggled everything and now they work fine. Problem Is I don't know what I jiggled back into place.
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Pmjolly
Posted on Sunday, October 21, 2012 - 12:13 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I've heard that if it's running normally, it's not hot enough to cause damage. The ecm goes into a skip spark routine to control overheating. I don't know if it is true.
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