I need help ! all of a sudden my 1965 Mustang coupe has developed a electrical problem. When I pull the head light switch (turning on lights) my starter kicks over with the engine running or off. I traced the wires from the head light switch to the firewall to starter and can not find anything wrong. I checked the wiring from the ignition switch to fire wall and starter can not find a problem. Does anybody know what would cause this problem??