I created this simplified 2.3L Ford Ranger ignition control module wiring diagram to make it easier to diagnose the ICM itself. It applies to the 1992, 1993, and 1994 2.3L Ford Ranger. Hope it helps you too! You'll find part two in the next page.
If you need to test the ignition control module, this tutorial explains the on-car test in a step-by-step manner:
The following may come in handy: