1999 Polaris 500 sportsman. Battery drains while
I suspect a bad connection from the relay to the starter, or from the starter to ground via the engine ground strap. More often than not there is a dirty/corroded connection somewhere. Check, clean and tighten all connections first. Don't forget the ground connections. (frame, engine, relay and battery) Apply dielectric grease to prevent corrosion at the connections and assist electric transfer. You may want to remove the connection, add dielectric grease and put it back together making sure your connections are free of rust and dirt.
Another idea is to jump across the relay terminals to see if it engages the starter or not. If it does, the relay is probably faulty, if it doesn't, I would suspect a loose ground connection or loose at the relay. Is the battery okay? Do you have a great deal of voltage drop on the battery while starting? Just because the voltage of the battery is ok, doesn't mean it is supplying enough amperage. Good luck, this is the way we learn, trial and error, keep at it, you'll figure it out.
on Dec 20, 2017