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Discussion Starter #1 (Edited)
I'm having problems with my trail boss. My battery died this winter and ever since I'm having issues with the fan running all the time as long as the battery is hooked up. I can unplug it and it will stop. Also the red warning light is on on the dash! I replaced the oil temp sensor on the oil cooler and that didn't fix the problem! I don't find any fuses anywhere to check! I also put a new battery in since the old one was shot! Anybody have any advice or possibly have had this problem? Possibly a bad ecm?
 

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My dad has same issue with his. Pulled out of storage, dead battery, tried jump starting it, wont start. Hear oil cooler fan running constantly. Seems it's a common problem with the ECM under the hood in front of handlebars.
 
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