I have wired a new ignition switch on . The engine will turn over now but will not crank. When I unhook battery it will crank and run by pull start. I only have the red wire(with inline fuse) and the yellow/red wire hooked up. What other wire will I hook up so this thing will fire? Its an 85 model. I don't have a mercury switch its just a 4 prong typical switch. batt./ign./acc/ I think i need a coil wire of some kind running to the ign. prong since it is hot while switch is on. just don't know what color. plz. help I appreciate any info!!