Checking ohms on green wire (ground wire) + negative battery should give low resitance.
Checking volts DC on blue/black wire (this is the wire from the ignition switch, supplies 12 volts DC) + negative battery terminal should give 12+ volts.
Checking ohms on blue/yellow wire (this is the wire from the pickup coil) + negative terminal should give 130ish-160ish ohms. A test light (LED type) should flash when turning the engine over if set up the same way.
Test light on black/yellow wire (this is the wire to the coil) should flash when engine is turned over.
Double check kill switch also. Sounds like a simple thing, but I've seen it enough times.
~Josh