2002 Sportsman HO taillight issue

Hi guys, I’m new to this forum. I must say that this forum has helped me alot in the past and I’m excited to finally be a part of it. Anyways, I purchased a 2002 Sportsman HO with only 230 miles and 35 hours (I know low right?) very clean machine and came with pretty much everything but a plow. Came with a winch, bumpers, etc. I noticed that when I start the ATV the taillight is on which I know is normal, but doesn’t light up brighter when I hit the brakes (hand lever). It simply doesn’t illuminate and it may even look like the brakelight is stuck on? Any help is appreciated, thanks!