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I would not waste your time with diagnosis, especially if you don't have an HDS or OBDIIC&C to turn the fan on/off to see if it is working. .

It's a very common issue and almost certainly a fan failure so just repair or replace it.

The fact fuses are blowing clearly indicates one or more of the fan drive internal mosfets are shorted.

If it was a simple break in a wire or failure of the MCM to command the fan on/off then fuses would not blow. (Reverse logic)
 

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So there is no way to bench test the fan without the HDS or OBDIIC&C devices you referenced?
You could disassemble the fan and then start visually checking the mosfets and testing them etc
Everything can be tested if you have the skills equipments and time etc.

10A+ 12V Bench Psu.
Decent multimeter.
Oscilloscope maybe.
Pwm source..

If you apply 12V 10A power to the fan and connect the PWM in wire to 12V+ or GND (forgotten which) it should run at full speed IIRC..
 

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You will have to swap over the innards (orange marks) but these should work.

2010 - 2014 Honda Insight Hybrid
2005 - 2007 Honda Accord Hybrid
2006 - 2011 Honda Civic Hybrid

Probably many others as well....

Try it with it unplugged if you want.

But if the MCM tries to command the fan you will get an immediate IMA fault and likely lose the dc-dc charging, so the 12v will die very quickly.
Take a spare fully charged 12v battery, spanners etc.
 
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