2000 FLHTP Tach fails
 

engine light on , hard to start, no tach. Next time I start (maybe) engine light off , fires right up runs great! Sometimes while riding and the tach is off and engine light on the light will go off and the tach will begin working. The whole thing is random and intermittent. I've checked wires and connections and tried to pull the check engine code with no success. HELP!