I was up outside of Georgetown, CO last week, and my coolant got so hot it was spewing out of the overflow valve of my reservoir. I have a 2003 Rincon 650. My temperature warning light came on. I obviously turned it off, let it cool, then coasted downhill back to my trailer. Thankfully it was only 40 degrees up in the mountains.
I've gotten it home, and I'm trying to diagnose the issue. My fan's 10 amp fuse was blown, so I checked the fan for rotation. It had a piece of rubber that has jammed in the fan . I removed the rubber and replaced the fuse, it now spins freely and easily.
Unfortunately this hasn't appeared to have fixed the issue. The fan doesn't turn on, even when I let it idle for 20 minutes. Given that it was 80 today in Denver, I would have expected it to come on, and the engine gets quite hot. I flushed and replaced the coolant as well while I was working on it.
I've been using this thread as a reference.
I've done the following.
Checked the sensor in the bottom of the engine. The wires appear to be connected to the sensor, but they're in a heat shrink. Do I need to cut the heat shrink off to get a better look at them?
I've used my voltmeter to test this connection right behind the radiator
Is that the wire that's referenced in the fan not working post? If so, I connected the blue wire with an exposed bolt on the frame. My voltmeter registered 14.5 volts, and the fan did not come on. If this is the right thread, I'm assuming it would have activated the fan motor if it was working correctly?
I also completely unplugged the male end of the plug. I tested the voltage flowing through both connectors on the female side from the control module, and it registered 0, so it seems it's not getting current. This means either 1) it's not hot enough for the sensor to activate, or 2) the sensor is also broken.
I'm struggling to isolate the problems individually. Can anyone offer a suggestion to test the fan independently of the sensor? I know both could potentially be broken, but it would be nice to be able to test each one to verify.