Ultimate cooling fan control - Yamaha Viking Forum
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post #1 of 34 (permalink) Old 02-04-2017, 03:26 PM Thread Starter
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Ultimate cooling fan control

I just got back from a weekend ride at brimstone. My cooling fan let me down on day two at dark. Luckily after letting it cool all the way off it worked just enough to get me back to cabin. While ordering UPI spal fan for my Viking I decided to come up with a kit to solve any electrical cooling system problems. I will have a trail tech tto temp gauge (could be any brand) with sender plumbed into inlet hose of radiator. I have built a connector that will go into inlet hose with a 195 degree on 180 degree off switch that will control the ground to a relay. The relay will control fan operation via the just mentioned switch and when it applies power to fan will also light up a led light so I will know fan is on. This system will be easy to diagnose or bypass on trail if there is ever a failure. I am also putting a switch in ground circuit of relay so I can keep fan off if crossing water.
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post #2 of 34 (permalink) Old 02-04-2017, 03:39 PM
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That's the same setup I have. I bought my switch/wire kit, it's definitely a piece of mind. Good stuff

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post #3 of 34 (permalink) Old 02-04-2017, 07:38 PM
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Ultimate cooling fan control

Great idea. I'm rebuilding my motor as the fan died 20hrs ago. Fried the big end Conrod bearing. Cheers


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post #4 of 34 (permalink) Old 02-04-2017, 08:34 PM
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Originally Posted by Mello View Post
I just got back from a weekend ride at brimstone. My cooling fan let me down on day two at dark. Luckily after letting it cool all the way off it worked just enough to get me back to cabin. While ordering UPI spal fan for my Viking I decided to come up with a kit to solve any electrical cooling system problems. I will have a trail tech tto temp gauge (could be any brand) with sender plumbed into inlet hose of radiator. I have built a connector that will go into inlet hose with a 195 degree on 180 degree off switch that will control the ground to a relay. The relay will control fan operation via the just mentioned switch and when it applies power to fan will also light up a led light so I will know fan is on. This system will be easy to diagnose or bypass on trail if there is ever a failure. I am also putting a switch in ground circuit of relay so I can keep fan off if crossing water.
Sounds like a great idea. Can you post some pictures?

Thanks.

CJC

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post #5 of 34 (permalink) Old 02-04-2017, 09:14 PM Thread Starter
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Will post pics when I get switch in.
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post #6 of 34 (permalink) Old 02-04-2017, 09:21 PM
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Here's what I used


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post #7 of 34 (permalink) Old 02-04-2017, 09:46 PM Thread Starter
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That is the gauge set up that I have. I was going to put my fan switch in that union but not enough meat there to tap in 3/8 pipe thread.
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post #8 of 34 (permalink) Old 02-04-2017, 09:50 PM
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That is the gauge set up that I have. I was going to put my fan switch in that union but not enough meat there to tap in 3/8 pipe thread.


Not sure what you mean but I tapped in to fan sensor wire underside of rad

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post #9 of 34 (permalink) Old 02-05-2017, 08:20 AM Thread Starter
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I am totally bypassing factory wiring with my own relay and a fan on/off switch threaded into a union that I built like the one in the gauge kit. After my fan failure I don't like how Yamaha controls fan with computer control.
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post #10 of 34 (permalink) Old 02-05-2017, 11:12 AM
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I am totally bypassing factory wiring with my own relay and a fan on/off switch threaded into a union that I built like the one in the gauge kit. After my fan failure I don't like how Yamaha controls fan with computer control.


Uhh ok gotcha...very good either way

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