BLR81471

Right now I have only had the machine on idle for like 20 minutes and had it lightly steam/overheat. Mainly because all the plastics are off. So i have not been out riding which is when it typically makes the red light come on. The last ride I was on before taking it apart it had the red light on and some pretty good steam.

Yes I looked at the diagram and saw the two sensors. As I mentioned I’ve replaced the one in the radiator. Not sure how to test the other. Does it affect fan operation? I’ve put power to the fan and it runs. Are you suggesting I should test this another way? Because I don’t understand your procedure in #34. If it powers on with direct voltage is there something I’m missing? how would I know if I blew a head gasket? power seems good on machine when running. I’ve run it with radiator cap off and don’t notice bubbles but will try again. Maybe I’ll video it so you can see.

Still trying to solve this problem. Replaced the sensor on the bottom of the radiator. Removed thermostat and tested it. It opens in boiling water then closes when cooled. Check the Diode and it seems to test as required. .8 one way and infinite the other. Checked Fan fuse and its good. What do I need to do next? I have run the machine at idle for like 15-20 minutes and it begins to steam from radiator. The fan does not come on. Im not sure if there is anything else in the fan circuit that I need to check? I see there is a sensor beside the thermostat with a single wire going into it. Is that the temp light sensor? Does that have any affect on the fan turning on? How can I test my radiator cap to see if that has anything to do with my problem. Any help would be greatly appreciate.

What are you referring to when you say Temp Switch? I have a Temp Sensor on the bottom of the radiator. It leaves there with two plugs. One that goes to the fan and one that goes to the diode and the battery I assume? If I disconnect the diode does that mean the fan will not operate at all? Has to be grounded in order for fan to operate?

I got the fan to start when putting 12V to it. I have changed the sensor at the bottom of the radiator. It still overheats. What should i try next? Is the Diode a cause? Thermostat? What triggers the fan to turn on? Because it will begin steaming and the fan wont turn on.

How Did you disconnect the fan and apply 12v? I have a 2003 Arctic Cat 500 TRV and having a heat light issue as well. Trying to resolve it.