No spark help!

I have a 90 BII with a 2.9, I have no spark from the coil. I have replaced the coil, pickup coil, tfi module, tfi pigtail plug, cap, rotor, ignition switch, relays, checked computer grounds at battery, and the computer checks out ok. I think I have narrowed it down to the wiring/grounds, but what wires? Where? tfi module ground maybe? where? any other suggestions would also be helpful