fan blowing fuses

[jlrenken]

ok it started doing this just a day or two ago. ill go out for a ride and when I get home Ill hit the kill switch to shut the machine off the fan kicks on for a sec then stops. then when I look at the fuse its blown. then Ill put a new one in right away and the fan kicks on for the duration of time till cool. can anyone give me a heads up on what the problem is. is my fan taking a crap or what.
thanks

 

[Cosworth]

Any oily residue in the fan area, sounds like you may have a oil soaked fan.

 

[jlrenken]

I know my rocker box leaks a tad and it has been a while since I washed it. but I did today. is there a chance that it can be cleaned off to work proper again

 

[Cosworth]

see if you can spin the fan by hand without it binding up. Its kinda a pain in the butt to get to but not impossible.

 

[jlrenken]

it does seem to move pretty free. this thing is when I get done riding and I hit the kill switch it kicks on for about a second or two and then the fuse blows. but when I change the fuse right away it kicks on as soon as I put the fuse in the slot with no problems. I tried a 15 amp fuse and it seemed to work but when the fan kicks on it is really slow, like its having a hard time starting up.

 

[Cosworth]

Still sounds like a oil soaked fan motor coil. Mine did this exact same thing till it finally would only turn 3/4 of the way without me helping it

 

[John422]

Or a short in your wiring. Got any rubbed bare spots?

 

[jlrenken]

its suppose to rain here for a few days ill dig a littler deeper this week and see what I can find. thanks for all the help in the mean time.

 

[jlrenken]

so I finally took the fan out to see if I could clean it up. but there really wasn't much for oil on it. I looked for some bare wires and didn't see anything. so I ran it for a bit with a 10 amp fuse and when the fan kicks on still blows tried it with a 15amp did the same thing. put a 20 amp in and it seems to work. is it bad to run a 20 amp fuse where it calls for a 10 amp. or is there any way to check the fan to see if that's the prob.

 

[303xb]

You need a new fan and new rocker gaskets. Mine looked OK from the rear, when I pulled it (with the same exact symptoms) the engine facing side of the fan was coated.

Do it now before riding season

 

[rchuff]

^^^^ what 303xb said change your fan the windings inside the fan are a draw and will keep blowing fuses and new gaskets will stop oil leak.

 

[user_deleted]

is it bad to run a 20 amp fuse where it calls for a 10 amp.

yes it is

 

[rchuff]

^^^^^^ [up]

 

[frimpa]

so I finally took the fan out to see if I could clean it up. but there really wasn't much for oil on it. I looked for some bare wires and didn't see anything. so I ran it for a bit with a 10 amp fuse and when the fan kicks on still blows tried it with a 15amp did the same thing. put a 20 amp in and it seems to work. is it bad to run a 20 amp fuse where it calls for a 10 amp. or is there any way to check the fan to see if that's the prob.

Hi, did you solve this problem? Did you bought a new fan and did it run OK then? Or are you still running with a 20amp fuse?

I have a XB12ss 2008 and have EXACTLY the same problem and I have tried 15amp fuse with no luck. But do not dare to put in a 20amp.

Before I buy a new fan I really need to understand this problem. Way does the fan runs OK (no fuse blow) after I have turned the bike off and replacing the 10amp fuse whit a new 10apm fuse? But the fuse blow every time the fan goes on when the bike is running or just has been turned off? This does not make sense to me, or does anyone have any explanation?

Sorry for my English guys but I am from Sweden

 

[user_deleted]

frimpa: trying to explain the mysteries and subtleties of electrons is beyond me....but these fans are very simple units that receive fused constant 12 volts of current....and your ecm completes the ground circuit activating the fan. when the fan has reached the end of its life...assuming your fan harness and connectors are in good shape...the 10 amp stock fuse will randomly pop. perhaps it is temperature related/heat related...but this is what they do. it is a random act of excessive amperage draw to initiate rotation if that makes sense.

 

[frimpa]

Okay, my problem is now solved. I bought a new fan and now everything works perfect. No more blown fuses!!

 

[Chicknstripn]

Frimpa- good on you for solving your issue and posting said solution.
Lunatic- you sure are a patient and kind soul. Great explanation oh wise one!