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1994 yamaha kodiak 400


Lennyb

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So my sister gave me her old four wheeler for my boys.  I have put new car on it among other things but I cant figure out why the cooling fan isn't working.  I took it off and connected straight to the battery and it works fine, but when I put it back in the bike  it wont work.  Im sure its electrical is there an easy way to check that.

 

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Welcome to Quadcrazy! So that fan should only come on when the engine gets hot enough.  It not supposed to run all the time. 

1. Have you ran it long enough to see if that’s the case ? 

2. It’s meant to turn on by a heat sending sensor that should be screwed into the head someplace.  Should have a single wire connected to it. When the fluid in the head gets hot enough that sensor kicks in and brings the fan on and will stay on even after you turn the bike off until it’s cool.   That could be bad. If your not sure take some pics and post them and we will point it out for you. You can take it out and clean the sending unit also  making sure the head is not clogged up with sh** by the sensor.

3. Is there a light for the engine being to hot on the dash anywhere? A high temp light? 

4. lastly have you checked all the fuses and connections for corrosion/dirt and unplugged sprayed contact cleaner and reconnected? 

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