Harness Inspection

Check for continuity between ignition coil and ignition switch with ignition switch connector and ignition coil disconnected. If continuity exists, proceed to step 2. If continuity does not exist, repair harness.
NOTE: Touch the circuit tester probes to both ends of the harness.
Check for open-circuit or short-circuit to ground between ignition power transistor and engine control module with ignition power transistor connector and engine control module connector disconnected. If continuity exists, proceed to step 3. If continuity does not exist, repair harness.
Check for continuity of the ground circuit of a ignition power transistor with connector disconnected. If continuity exists, proceed to step 4. If continuity does not exist, repair harness.
Check to be sure that there is no continuity between the ignition coil and the ground with connector disconnected. If continuity does not exist, proceed to step 5. If continuity does exist, check for short in ignition coil primary circuit.
Measure the voltage of the control signal circuit of the ignition power transitor with connector disconnected and ignition switch in the START position. Voltage should read 2 to 6 volts. If voltage reading is correct, proceed to step 6. If voltage is not correct, repair harness.
Measure the voltage of the ignition timing adjustment terminal with the ignition switch in the ON position. Voltage should read 4.0 to 5.2 volts. If voltage reading is correct, stop. If voltage is not correct, repair the harness.