Quote Originally Posted by hawgdog View Post
You mean the 3rd lead on charger hooked to cranking battery? I never unhooked the cranking battery
He is referring to the 3 amp lead. Also check your motor's charging circuit. Creating a spark somewhere is the easiest way to blow a diode in the rectifier. If it's OK you should see 13-15 volts at the starting battery with the motor running 1500-2000 RPMs.