the horn on my 1978 puch newport doesn't sound when I press the button, only when I turn the handlebars anywhere left of center. Weird? yes, I know. All the wires are where they should be and snug in their fittings. It's really annoying to have the annoying buzzer sound anytime I take a slight left. Sometimes when I am riding and I turn left, the horn cuts out and back in briefly and randomly, but while at a stop it sounds anytime I turn the handlebars left. Any flippin' ideas?