For step 4, keep the - of your volt meter lead connected to ground, then connect the + of the volt meter to the - side of the coil. If you get 4-8 V reading, that means the primary of the coil is working but the coil discharge has not been triggered by the distributor grounding the coil. Then, you remove the distributor middle ignition lead and connect it to ground while leaving the other side still attached to the middle of the coil. Then, you use a small flat screwdriver and place the tip in front of the sensor face in the distributor, and that will have the same effect as when one of the rotor teeth passes in fron of the sensor: it will be detected by the sensor and make the transistor conductive. This will ground the - of the coil, triggering its discharge. If that happens, then the meter should read 12V+ on the (-) of the coil.
The pictures at the bottom of the Seloc 10-46 page explain the process.
This procedure is identical as the one explained in the OEM.