What did you do with the Brown/start wire? The coil + usually receives battery voltage from the ignition switch during cranking only, from the brown wire. the way your diagram shows it the coil never receives full battery voltage. Cant say thats your problem, but......
If you have a 5pin ECU, then all 5 pins need to have wires on them. A 4pin ECU plugs in directly, with no mods required to the 5pin wiring harness.
The dark green wire powers up the 5pinECU. It cant run without it. Nor can it run without having the case properly grounded. And loose or corroded battery terminals is just plane laziness.
You can prove that the ECU is alive by: Take the coil wire out of the cap and clamp the wire to something grounded, such that the conductor wire is about .25 inch from the grounded surface. Make sure that there is/are no flammables in the immediate area. Then have a helper turn the ignition key to RUN, and then OFF.If the ECU is alive it will command exactly one spark every time you cycle the key.If it passes that test:next have the helper crank the engine for a couple of seconds. A stream of sparks will issue forth.If it fails the first test, it will fail the second as well.The first test proves the wiring and ECU. The second proves the magnetic trigger in the dizzy. After that its just cap and rotor. Oh, wait. I forgot the coil test.
Coil test;These old coils just need 2 things, like most electrics. 1) power, and 2) a ground. The power is right there at the coil plus. Or is it? Prove its there. Then you just have to switch the ground side. Disconnect the wire thats on there now, and hook up a 3 foot or so jumper wire on it instead.Hook up the coil high tension wire as before with the .25 spark-gap. Now with the coil powered up you will do the switching with the jumper wire.For newbies this may require a bit of practice. Just strike it against a good ground.You need to be fast. Just touch the wire to ground and immediately un-touch. This will produce one spark each time you strike it. What I find works really well, is to take a long coarse file, ground one end and then just drag the jumper wire along it. This produces a stream of sparks. Ok anything I missed? Oh yeah, get a wiring diagram if you cant make it work.I mean a full wiring diagram, for your body style. And another for the 71 up ignition system. So you can prove the last guy wired it up right.