My trike began to read 9volts on the meter. I took it to the stealer. They said it was a dead battery (charged it) and said it was fixed. The next day, same thing the stealer this time said it was a bad voltage regulator. About two rides later the volt meter started reading 9 volts, 10 volts, 12 volts, 14 volts (normal for my trike). Then it would go up and down at random. The check engine and battery warning lights would come on while it was discharging and go oo when charging. Any ideas what is going on?