New yamaha drive headlights intermittently don't turn on

I have an electric yamaha drive and the headlights will turn on, I'll drive over to a neighbors house, sit for a couple hours and when I go to turn them back on about 25% of the time they won't come on. Other times there is no issue. When they won't come on and i drive back to the house. I'll throw it on the charger and when I come back out they will flip on.

I don't think the charge has anything to do with it because it never gets below 75% per the battery gauge.

Any ideas???