Cranks but no spark

What have you checked so far and what were the results? Have you read the diagnostic fault codes? Do you have a scanner? If you do, look at the live data screen at the crankshaft position sensor and camshaft position sensor to see how they are listed during cranking. Look for one of their signals that is missing.

If you do not have a scanner, use a test light to see if the automatic shutdown, (ASD) relay is turning on. Look for the wire that is the same color at every injector, the ignition coil pack, or either smaller terminal on the back of the alternator. Typically that is a dark green/orange wire on cars and minivans. I think that applies to trucks too, but I am not sure. Back-probe that wire. A digital voltmeter will work too, but they do not respond as fast as a test light.

You should see the test light turn on for one second when you turn on the ignition switch, then it will turn off. What is important is whether it turns on again during cranking. If it does not, the cam and crank sensors are the best suspects.

Chrysler makes reading engine fault codes much easier than any other manufacturer. Cycle the ignition switch from "off" to "run" three times within five seconds without cranking the engine. Leave it in "run", then watch the code numbers appear in the odometer display.

Did you see twelve volts on the dark green/orange wire for one second when you turned on the ignition switch?

If it doesn't crank, I would begin by checking the battery and starting system. Check all cables for corrosion/high resistance first. Have the battery load tested, also.

Your starting point here is you need to fix the short circuit that causing the engine fuse to blow

Any applicable mil codes? Did you check primary voltage at the ignition coil and fuel injectors, engine cranking. Dark green wire with orange tracer should be hot. Use a gage and check fuel pressure. Just for testing, unplug your 02 sensors then see if it will start?

Check all fusible links in pic they go off of starter relay check fuel pump relay for power.

If you are getting power to coil crank engine with large coil wire removed from dist cap and ground that out to see if yo are getting spark. If it sparks there then the dist cap or rotor is bad. Teste resistance of coil it may be bad coil. Pickup coil should have 400-800 ohms if it's good ornot.

It can also be the module as well.

Which ignition system do you have? There is either a five-pin ignition module on the firewall or fender, or the computer bolted to the air filter housing.

Check your ballast resistor on the firewall what happens when it goes bad is the car will try to start on start position on ignition switch then shut off when you let off key. Check pickup coil for air gap.008-.010" and for ohms 150-900 ohms if out of range pick up coil is no good. Finally check coil at positive and negative if 10 volts on both the control unit is bad.