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Discussion Starter #1
skeeter (jeff) and i were talking a fnr about wiring the factory temp light to come on when the fan comes on if you're running an aftermarket temp guage. i did it today. here's how. instead of grounding out the idiot light i just terminated it inside the harness on the engine. under the hood, locate the white wire with 2 blue stripes coming out of the back of the digital display and tap it to the blue wire going to the fan (i spliced it under the battery box to keep it short) and you're done. i took it for a test run and ran it hard until the light came on. then i eased off a bit and a few seconds later the light went out. i don't know if this has any real value to anyone but i was bored.
 

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Fan By-Pass Switch

It has value to me...I plan to monitor fan cycles...

I have a different approach however...

I am installing a fan by-pass switch...which is an illuminated marine rocker switch...

When the thermo-switch applies voltage to the fan...it also applies voltage to the illuminated side of the by-pass switch...

Therefore...when the thermo-switch is functioning normally...the light for the by-pass switch is on/off with fan...and can be monitored with temp gauges as does yours...

If the temp gauge indicates fan should be on...but isn't...if it is the thermo-switch...the by-pass switch completes the circuit and the problem is solved...at least temporarily...

In many cases...folks have taken to wiring the fan to the ignition switch so the fan is on at all times the key is on...this has been known to solve overheating problems...

Personally, I don't like that...so if the need to run the fun full-time does arise for me...I prefer to have a seperate over-ride switch for that...

Bottom line is that using the temp warning light to monitor the fan's duty cycle and on/off temps is an excellent idea imo...

It is definetely a winner...:beer2:
 

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Nice Idea Price I will look into doing this too. wish I could think of things like that when Im bored instead of porn.... opps did I say that out loud
 

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Glad it worked out for you.great idea. Ill also be doing that once my temp gauge is installed. What temp did the fan kick on?
 

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Discussion Starter #7
Glad it worked out for you.great idea. Ill also be doing that once my temp gauge is installed. What temp did the fan kick on?
the fan/light comes on when the gauge reads about 185-190 (don't know the accuracy of the gauge, probably +/- 5 degrees). it goes out at 175-180.
 

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I still don't see how wiring the fan to always run could affect the high temperature at all!

I mean, if the engine hits 170, the fan turns on anyway. At that point, it doesn't matter if the fan is wired on all the time since it will be on either way above 170.

Wiring it full time may slow the time down to reach 170 a bit, but how can it keep the engine from overheating since it already turns on above 170 everytime??????
 

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I still don't see how wiring the fan to always run could affect the high temperature at all!

I mean, if the engine hits 170, the fan turns on anyway. At that point, it doesn't matter if the fan is wired on all the time since it will be on either way above 170.

Wiring it full time may slow the time down to reach 170 a bit, but how can it keep the engine from overheating since it already turns on above 170 everytime??????
I hear you Rob...

I think the same way...

However, you can't argue with success and KMS is telling guys to do exactly that...they do it...and it seems to work for them...

I don't know...personally, I never even considered it...I am taking a completely different approach...

Having a light come on/off when the fan is supposed to be on/off does at least let you know if your thermoswitch is applying voltage to the fan or not...

Having a by-pass switch allows you to apply voltage to the fan in the event the thermoswitch is stuck open...it will also prevent that obscure ckt brkr that has been known to wreak havic from stopping you from having a cooling fan when it is supposed to be on...

As for why the 'KMS FIX' works or if it even works like guys claim I don't know...but, I would assume your guess about it getting a "head start" is the only one that would make sense...

Once upon a time...I had a Chevy truck that the fan clutch went out on...it was expensive...I was broke...so I put a direct drive on it...never came close to running hot again...

In the winter time...here in Chandler...I had to put cardbord in front of the radiator to warm up enough to drive without the choke on...so Yes...it does keep it wayyy cooler wayyy longer...

I guess the opposite side of your arguement is that if did not have a fan at all it wouldn't matter because it's gonna get hot anyway...and we both know the fan does make a huge difference...if it didn't...it would never shut-off...

I still view it as a desperate manuever... ;)
 

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I can try to explain but I'm no physicist. An example would be if you've ever heated a swimming pool, it starts out slow and as the water heats it heats Exponentially faster. Meaning it accelerates. I believe it has something to do with water molecules vibrating and transferring the heat to the next one. As more molecules begin to move the rate expands because 1,2,4,8,16,32,64. You get the picture.

The idea of staying ahead of the temp is to stay at a lower point on the exponent of heating.

I think we can all agree the fan does cool the water temp and more fan will cool more.

Oh and I stayed at a Holiday Inn last night.
 

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Discussion Starter #12
Can someone advise the simplest, yet realiable, way to permanently turn on the fan?

I will try it and see if it helpd.
probably splice the power wire into any of the switched wires. if you don't use the 12v acc plug alot, that would be an easy fix.
 

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The simplest is not the most reliable...

You should call KMS and at least see what they say...

You could also pm Al Cpwn on the BRP forum...he is the one who bought the PWR and still had problems...he wired his fan full-time per KMS' advice and said it works fine...

Rob...this thread may help you some... http://www.rhinoforums.net/showthread.php?t=3462
 

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Hey guys trouble with my fan on 2008 rhino 700.. fan not coming on but when I unplug sensor start motor heat warning on dash lights up flashes code 21 and fan comes on plug sensor back in code goes and fan won't turn on..
 
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