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 Post subject: Blowing Fuse
PostPosted: Fri Apr 13, 2018 4:05 pm 
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Joined: Fri Dec 12, 2008 6:28 pm
Posts: 152
Location: Skerries, Ireland
Hi,

I am having an issue whereby the10 amp fuse which the power valve servo is on is blowing. Noticed power valves were not cycling on ignition turn on and traced to the fuse. Replaced the fuse, thought the problem was doves as worked for a few days but now it has blown again.

I would be very grateful for any help or info on what might be causing this.


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 Post subject: Re: Blowing Fuse
PostPosted: Fri Apr 13, 2018 4:30 pm 
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Joined: Tue Jul 19, 2011 7:49 pm
Posts: 250
Location: Toulouse France
This fuse also drives fan motor. Take a look at the thermo switch and fan motor. I guess you have something wrong there.


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 Post subject: Re: Blowing Fuse
PostPosted: Fri Apr 13, 2018 5:16 pm 
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Joined: Fri Sep 02, 2011 7:02 pm
Posts: 330
Location: UK
phildu31 wrote:
This fuse also drives fan motor. Take a look at the thermo switch and fan motor. I guess you have something wrong there.


Thats kind of correct, The servo shares a circuit with the the thermo sender unit (which then operates the fan)
living in Ireland at this time of year cant imagine you will suffer any over heating problems,
disconnect the sender unit and see if the problem persists.
I had this very same problem.


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 Post subject: Re: Blowing Fuse
PostPosted: Sat Apr 14, 2018 10:28 am 
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Joined: Fri Dec 12, 2008 6:28 pm
Posts: 152
Location: Skerries, Ireland
Thanks guys, read another thread as well where it suggested ithe Thermo switch was the most likely cause of the problem. Are these known to fail? Is there a replacement available Ivor are they the same as any other bikes e.g. the RZ/RD 350???


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 Post subject: Re: Blowing Fuse
PostPosted: Sat Apr 14, 2018 4:21 pm 
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Joined: Tue Jul 19, 2011 7:49 pm
Posts: 250
Location: Toulouse France
Your thermo switch is certainly still good.
If thermo switch fails, fan will never run or always run.
Most probably the problem is your fan motor which is probably in short-circuit. So, when thermo switch goes on you blow your fuse.
First, you can bypass the thermo switch. If fan runs : fan is ok, if fuse blows : fan is dead.
Or you can wire the fan directly to the battery.
Or check the resistance of the fan with an ohmmeter.


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 Post subject: Re: Blowing Fuse
PostPosted: Sun Apr 15, 2018 9:30 am 
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Joined: Thu Nov 17, 2005 11:12 am
Posts: 371
Location: Leicester, NC
If you need a fan in excellent condition, I have several. Contact at <rick@lancegamma.com>

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 Post subject: Re: Blowing Fuse
PostPosted: Sun Apr 15, 2018 12:15 pm 
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Joined: Fri Dec 12, 2008 6:28 pm
Posts: 152
Location: Skerries, Ireland
Hi Guys,
Thanks for the info. I’ve seen a few posts suggesting it is the Thermo Seitch which they are saying can develop a short, whilst phildu31 you reckon it’s the fan. Haven’t had a chance to wire the fan up direct but just wondering how confident you are it’s the fan, could it be either? Or has past experience show which it is more likely to be?


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 Post subject: Re: Blowing Fuse
PostPosted: Sun Apr 15, 2018 12:37 pm 
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Joined: Tue Jul 19, 2011 7:49 pm
Posts: 250
Location: Toulouse France
To bypass the switch, you just have to unplug the connector under the tank.
Then connect the two plugs in the connector with anyhing you have in hand and see what happens.
Very easy to do.
Either fan will start or fuse will blow...
Next step will depend.


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 Post subject: Re: Blowing Fuse
PostPosted: Mon May 07, 2018 5:06 am 
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Joined: Fri Dec 12, 2008 6:28 pm
Posts: 152
Location: Skerries, Ireland
Hi,

Bypassed the Thermo Switch and the fan runs fine. So new Thermo switch on order.

Thanks for the help/Tips


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