HELLO TO ALL OUT THERE! SO MY BUDDY SOLD ME MY FIRST HARLEY (88´ ELECTRA GLIDE) ABOUT A YEAR AND A HALF AGO. NOTICED THE OTHER NIGHT VOLTAGE WAS JUMPING FROM 0-MAX. I KNOW WHEN THERE IS A CHANGE IN LIGHTS OR BLINKER IS ON VOLTAGE JUMPS; HOWEVER, THIS WAS JUST ON A STRAIGHT RIDE. ANY IDEAS, BATTERY, LOOSE WIRE?