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Hello; I have a 2006 yamaha Bruin 350 4x4. Recently the oil cooler fan has stopped coming on. I have tested it and the whole circuit seems to work , ( I have pulled the connector off the thermal sw. and put a 220ohm resistor acrosss the terminals, the fan and oil light came on. I have also tested the thermal sw. itself, as per manual I put it in oil and heated to 170'c,manual says you should measure 220ohms and I measured about 300ohms, this is close and don't think its the problem, I'm wondering if the oil is getting to the sensing element on the thermal sw. Is it possible the line is blocked or oil is not circulating to this part of the engine. I would change out the thermal sw. but they are $134 and I'm not convinced its the problem. Any help with this problem would be appreciated
 
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