engine temp light

my engine temp light came on a few days agoe bc i forgot to turn the fan on but i noticed it quickly and got it turned on and the temp dropped back to normal in just a few minutes. now the light stays on and my temp guage is reading 190. not sure why its staying on? any help???? 06 686

I've heard of that happening before, I think people were asking which side the you mounted the temp. sending unit on the radiator or something, anyways bump back to the top!

I think the question we need to ask is why your fan didnt come on automatically?

i didnt come on because i have afan override switch on it. im not your what side the sending unit is on. all these things were on it when i bought it..but i'll go look and see what side it is on

its still supposed to work when the switch is off if its done right

im not sure how the switch is wired.

I remember a thread about which side of the radiator the temp. sending unit was supposed to be on did it turn out matter which side or was it alright on either side?

Heres a little reading.
http://www.rhinoforums.net/engine/50467-water-temp-sensor.html

I mounted mine in the return line just inside the left front fender well. I wanted to know what my engine temp was instead of what my temp was coming out of the radiator.

txgrown1404 wrote:

my engine temp light came on a few days agoe bc i forgot to turn the fan on but i noticed it quickly and got it turned on and the temp dropped back to normal in just a few minutes. now the light stays on and my temp guage is reading 190. not sure why its staying on? any help???? 06 686

OK, it looks like we have 2 separate things going on here in the thread.

One is why is the temperature warning light staying on. The 660 overtemp sensor switch is mounted on the engine, screwed into the hose outlet housing that looks like it should have a thermostat in it. From your description that switch has somehow failed during that episode. Look at that sensor to fix the idiot light problem.

The other thing is the fan switch (radiator temperature sensor) is apparently disabled somehow. It sounds like you are not the person who installed the fan over-ride switch? Perhaps long ago the fan switch failed and someone put an override switch in to enable running the fan in spite of the sensor failure? The normal over-ride switch setup is simply a switch that shorts across the sensor switch when it is desired that the fan run, even if the radiator is not overly hot. This scheme allows the fan temp switch to still function normally and run the fan when the radiator gets too hot. This fan over-ride function can also be done in different ways, such as using a different source voltage, such as directly from the battery through a switch and then on to the fan motor. This might have been done if there was a blown fan fuse or failed fan circuit breaker. Another reason the radiator overtemp switch may have been disabled is to prevent the fan from starting up, when the front end is immersed in water, when playing submarine games with the machine. There are different (and better?) ways to wire up that circuitry such that will allow deliberately disabling the fan while still retaining that automatic fan turn on at a different switch position.

It looks like you have installed a temperature gauge. That seems to be working just as it should. I'm not sure why all the comments on how to rig up a temperature gauge here.

Sound Like His fan override switch is actually a switch to turn the fan off (disable). I seen people do this that run in deep mud or water.

the guy i bought it from ran it in the dunes most of the time didnt play in deep mud

txgrown1404 wrote:

the guy i bought it from ran it in the dunes most of the time didnt play in deep mud

So You have to turn the switch on for the fan to come on ?

Firefighter wrote:

txgrown1404 wrote:

the guy i bought it from ran it in the dunes most of the time didnt play in deep mud

So You have to turn the switch on for the fan to come on ?

yes i ran it for about 20 minutes and it got to 170 and it never came on. i have a toggle switch on my dash to turn it on and off. after riding for a few hrs and i go to turn the machine off, it wont shut off until i turn the fan off

txgrown1404 wrote:

Firefighter wrote:

txgrown1404 wrote:

the guy i bought it from ran it in the dunes most of the time didnt play in deep mud

So You have to turn the switch on for the fan to come on ?

yes i ran it for about 20 minutes and it got to 170 and it never came on. i have a toggle switch on my dash to turn it on and off. after riding for a few hrs and i go to turn the machine off, it wont shut off until i turn the fan off

Now, that is interesting. It is normal for a Rhino to run on for a few seconds after you turn the key off, but only if the fan happens to be running at the time. The fan motor acts as a generator and powers the electrical system as it winds down.

I suspect that what is going on is that the auxilliary fan power switch is getting its power directly from battery hot. If so, that is powering your entire electrical system when the switch is in the on position. I suppose that would be a good thing if you lost your ignition key, but..... You really should rewire that such that the switch simply jumpers the two contacts on the radiator thermoswitch.

Here is a schematic for the 660 fan wiring with a remote bypass switch installed. The 700 is different in that it uses a relay controlled by the ECU to control the fan. There, you bypass the contacts of the relay with the remote switch.



If you have problems then with the fan not working you may have uncovered problems with the original thermoswitch or the thermal breaker. Let us know and it can be fixed properly.

I read it over again and misunderstood the question, for some reason I was believing the idiot light and thinkin the gauge was giving false readings. I'm becoming a HUNTERWORKS!

CustomizedRhino13 wrote:

..........I'm becoming a HUNTERWORKS!

HaHa Oh, NO! Do we have to start banning people around here? Long live the Banana republic!

thanks guys i'll check the wiring and get back with all. withs all ya'lls help i have learned so much and havent had tp put it in the shop yet. more money i can spend on upgrades. love this forum