BKW78

I work at a chemical plant. The electrical shop has a test bench where they can heat temp sensors to test them. They can check at what temp the contact opens and then where it resets.

I haven't rode the bike for 3 days. When I turned the key on the "HOT" warning starts flashing the oil was changed and the coolant level is correct. The bike runs fine even with the light flashing, the fan just runs all the time even with the key off

The "engine hot" warning keeps flashing even when the bike is off for several hours. i unplugged the temp sensor and had it tested. It appears to be fine. With this warning flashing the fan wants to run all the time. I have not been able to locate a wiring diagram on the net, is there a relay that could be stuck?