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)