Long story short....leavin the boat ramp sat. and go to push the tow button and she no light up. Leave for home sunday and its workin fine again. Stop in wyoming for some frosty adult beverages and it not workin again. Any ideas what to check? What exactly is the function of that button....does it lock the torque converter? What is towing going to do with out it.....just be extra hard on the trans? or??