2012 750 Terex won't start at times
 

I have a 2012 &50 Terex that the belt light comes on dim then gets bright after a while, when this light comes on and you cut it off it won't start until it sets for a while. When this happens I've noticed you can turn the lights on and their bright but engine won't even click or try to start, then after 20 min. or so it starts fine and light goes off. No shorts unless something in battery, or does the belt cause this?:huh:

2012 750 Terex