I believe this is a full-size truck and not the Dakota. If that is wrong, let me know.
Looking at the wiring schematic, the coil gets power from the ASD relay. In addition to the coil, the fuel injectors, oxygen sensors, and a few other things get power as well.
First, I need you to check fuse 4 in the under-hood power distribution box. In addition to checking the fuse, make sure there is power to and from it. See pic 1 below.
If that is good, locate the ASD relay in the same box. See pic 2. If there is a different relay with the same part number, switch them to see if it makes a difference. If there isn't one, here is a link that explains how to test a relay:
If the relay is good and there is power and ground to the correct pins as identified in the above link, I need you to turn the key on and check the dark green wires with an orange tracer at the injectors for power. Once the key is on, they should have power. If they have power, the problem is the green/orange wire between the injectors and the coil.
Let me know what you find or if you have questions so I can further direct you.
See pics below. Note: Pic 1 starts at the fuse, pic 2 is the relay, pic 3 shows power to the injectors, and pic 4 shows power to the coil. Note there are several splices in the wiring. They have been known to corrode and lose contact.
Images (Click to enlarge)
Thursday, October 27th, 2022 AT 8:14 PM