4×4 possibly not engaging

I was racing this past weekend and thought that my 4×4 was not working properly. I would be going up smaller hills that were somewhat slick and would end up almost not making it to the top. I would be on the gas, then would have to feather it to get traction (like I would on my sport quad). I thought it was doing the same thing a few weeks ago at another race. My actuator sounds like it is engaging and the 4×4 light comes on and off. Any way to check to make sure it is actually in 4×4. This is my first year racing a Can Am 4×4 so sorry if the question is basic.