I just purchased a 40 hp evanrude and put on my boat, the engine runs great once I got the controls hooked up, the guy I bought it from cut some of the wires to the Tac and I'm not sure I got them all hooked up right, sometimes the ck emgine light comes on when I turn on the key even if the engine is not running, and sometimes comes on while the engin is running, but it still runs great? What is the ck engine light trying to tell me, and why does it come on when the engine is not running?