My 08 sportsman 500 ho battery lighy blinks only when i drive over 10mph. Idle it never comes on.... any ideas?

 

Check battery connections first then use a meter to see what voltage is at the battery at an idle then increase rpm and see if it drops. If it does could be an ecm module going out if you have the carb model or a regulator if you have the efi model. Plus could be the battery itself may not be able to hold a charge if it has a dead cell even if it's charging over 14 volts. A load test can confirm if the battery is good or not if you have any doubts about it.

 

Already load tested battery and its good, checked connections and they are good. Tried new ecm and does same thing. Getting 12.9 volts while running. By the way it is a carb. What shall i try next?

 

Next thing would be the charge coil from the stator itself if the ecm didn't help. You can do a general resistance test on the yellow wires from the stator between each other. Should be a small amount of resistance between each other plus no yellow should short to ground,but the best test is the ac voltage test specs from the manual to see if the stator needs replacing.2008 Polaris Sportsman 500 Service Manual PDF Download

 

Stator tests out fine from a previoua post on here. Im at such a loss. I cant even sell this atv and still feel right about it

 

IF you're sure about the stator and you replaced the ecm,then it's possible you could have a bad ecm straight out of the box. I've replaced multiple ones on the same machines,but granted not one that didn't at least work for a little while. That's about all I'm down to unless you have a faulty harness connector like one person posted about recently.

 

What harness exactly? How expensive are they? Are they easy for a common knowledge guy to do?

 

Harness connector,forgot exactly where,but a pin had pushed back or something of that nature and not making good contact. Used a place similar to this one.Motorsport Regulator, Rectifier Connectors - Corsa Technic