1997 Dodge Caravan Changed engine and the van won't turn on

A 3.0L is now a new 3.0L and no spark from coil? Was the same electrical system wiring harness used? Where was the control module bought and was it also from a 3.0L same year? Without shutdown relay energizing, no spark, no fuel, no dist. Signal, no current to coil, no spark. You should hear this relay click on when cranking or even turning key on. Does the check engine light come on? There are many reasons that the coil won't fire. Make sure the PCM is getting power from the fuses under the hood in the power center. The ignition key also supplies it with power.