I had the exact same no crank, no start issue with my 2007 Polaris Scrambler 500 a few months ago. After going through all the usual suspects—battery, starter motor, and wiring—I finally found the solution. In my case, the problem turned out to be the ground connection. The ground wire was corroded where it connects to the frame. This corrosion was preventing a good electrical connection, which meant the starter motor wasn’t getting the power it needed to crank the engine.

Here’s what I did to fix it: I traced the ground wire from the battery to where it connected to the frame. I disconnected the ground wire and used some sandpaper to clean both the wire terminal and the spot on the frame where it attaches. After cleaning, I reconnected the ground wire, making sure it was tight and secure. I also checked other ground connections and cleaned them as a precaution. Once I did this, my Scrambler fired right up without any issues. If you haven’t already, give this a try. It’s a simple fix but can often be overlooked.