80 750 twin no spark

there is no continuity between either blue and black wire and ground. blk/yellow does have continuity to ground.

However, I redid the pickup coil resistance test. Now I am showing an open between the black/blue wires. The manual I am looking at says they should have 360-540 ohms. Its weird, I tested this on friday night and had 450 ohms there. Now I just did it 4 times and show open each time.

Bad pickup coil?

Yes, blue to black on the pickup should never be open.