STEP 1) NO SPARK?

     CHECK BATTERY VOLTAGE,  CONNECTIONS, AND CLAMP ON DISTRIBUTOR         BASE.

     WITH KEY ON, CHECK FOR VOLTAGE ON COIL POS TERM, NO 12V CHECK           IGNITION SWITCH AND HARNESS.

STEP 2) STILL NO SPARK? BUT 12 V ON COIL +

     REMOVE THE WHITE / GREEN TRACER WHITE FROM DISTRIBUTOR, SPIN         ENGINE.

STEP 3) STILL NO SPARK?

     IF NO 12 V IN  RED LEAD COMING FROM MODULE, REPLACE MODULE.

STEP 4) STILL NO SPARK?

     WITH KEY IN RUN RAPIDLY TAP THR WHITE/GREEN WIRE ON IT'S TERMINAL

     WHILE CHECKING FOR SPARK FROM COIL CENTER TERMINAL HIGH VOLTAGE.

IF SPARK, REPLACE DISTRIBUTOR SENSOR

IF NO SPARK TRY NEW COIL