Helping out my mate's car problem, he got a honda 1995

His radiator fan won't stop after he turn off the engine, the only way for him to stop it is to take out the fuse inside the engine fuse box.

So any idea what is the problem and how to fix it?

sticky relay.

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Long live the WRC

So what should he do on it

find and replace the relay

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I used to tune cars with screwdrivers.
Clutch, Brake, Accelerate.