cranks but no spark at coil

Sorry for the translation Del.
#4. When I run a wire and connect coil -ve to battery -ve and try for spark from coil tower wire to ground, I get nothing. Thats with everything hooked up and key on.
I repeat above test with ecu unplugged and I get spark BUT its coming from the coil -ve to battery -ve . Nothing from coil tower wire.
Fn intermittent ****.
You can see in pics the wires are a little shabby but none are broken, the plastic is brittle and falling off but wires show continuity.
#2. Coil -ve to ground 1.4V key on
#3 Coil +ve to ground 7.4 V(key on)

??

What means "When I run a wire and connect coil -ve to battery -ve"

The coil NEG terminal connects only to the ECU. You don't hook it to battery or ground or anything else. The only other thing hooked to coil NEG besides the factory ECU wire is a tach if you have one, and IF you do, I would unhook that