One coilpack not getting spark but does have power at wire

Here's the diagnostic list:

1. Check for 12V at the center pin of the harness plug.
2. Hook a current clamp to the control wires (requires an oscilloscope) and check for the current ramps (two ramps at idle and one while under load).
3. Check the spark output with an inductive probe (also requires scope). It should have between 5 and 10 KV.
4. Check for opens in the harness. Easiest thing is check resistance between the block at the firewall and at the coil pack.

I'm attaching traces for you to see what a functional coil will do.

The red trace is the coil current ramps at idle. The 14 Amps draw is maximum so it is not drawing that for any appreciable time. That's a good coil draw.
The spark output (blue trace) is low due to low compression in the engine.