wiring a fan to a wr450f through ignition

4 replies to this topic
  • wr450man

Posted October 22, 2011 - 05:29 PM



I just purchased a 4" spal fan.

I want to wire it to my 2006 wr450f (has a baja kit with key).

I would like the fan to work only when the engine is running (through the ignition )

Has anyone done this type of wiring? Which color wires did you connect to?

I intend to use a switch to turn the fan on and off, but I want it to be working only if the engine is running.


  • alwayson1wheel

Posted October 25, 2011 - 07:22 AM


not sure on all of the wires as i just recently got my wr, but i would atleast power it through a relay so it wouldnt burn it up. i wouldnt just run it off of the ignition.

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  • GuyGraham

Posted October 25, 2011 - 10:24 AM


you want a switched live, which are brown on Yamaha's

  • wr450man

Posted October 25, 2011 - 01:20 PM


perfect, thanks!

  • ur2silly

Posted October 26, 2011 - 04:54 PM


Here is what I did. Even though the relay I bought ended up being crap, the concept would be the same with a quality relay. Hope this helps



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