When I try to start my Ascender, the back windshield wiper blade turns on and releases washer fluid but the engine won't turn at all. The lights, radio, and windows work properly. My battery is only a couple of months old. I have been towing a trailer for about three months as well. Don't know if this has anything to do with it or not. I had a tune up and replaces all valves two months ago. It first happened today right after I finished working. I was able to start it after a while to drive home. I tried again and it won't start.