Your most welcome Patrick. As far as not being automotive inclined , we all had to start somewhere . I'm a diy'er as many of us are . There are many in this forum whom are vastly experienced with jeeps or automotive in general but I try to pull my weight. The question you asked of what is a PDC , that abbreviation is Power Distribution Center. That is the oblong black plastic box under the hood where the fuses and relays reside. I'm sure your already aware of its location and existence since you've found the blown 60amp fuse . Btw , as the owner of your jeep , your already more inclined than your aware . Your making a conscious effort to do what you can . That's a start right there. About obtaining a wiring diagram , try autozone online and establish an account . It's free and they email coupons for discount to boot ! Autozone has wiring diagrams that may be helpful but if the page you need isn't on their site , maybe your dealer's parts counter can furnish one. This spark you mentioned , I'm taking it that you touched the solenoid wire to the battery connection on the starter ? Well , that is what will cause the starter to activate. The battery positive will go from the battery positive to the starter solenoid . There is a smaller gauge wire that comes from the ignition switch under the steering column that goes live when you turn the key to start position. At this point , a wiring diagram may come into play . They are helpful but also confusing if we don't have a legend to what some symbols mean . But just the fact of where the line originates from and goes to is extremely helpful and leads us in the right direction. At least we know where to look to do our visual inspections. Without it , we would find ourselves tracing blindly and removing a lot of wiring harness wrap and other items possibly just to find out we needlessly did so. There are tools like test lights and digital multi meters to help us but we must be cautioned when using them or we can cause damage to,sensitive electronics. Taking a simple voltage reading across the battery posts is harmless but touching a computer circuit with a 12 volt test light is harmful. Before we attempt to check electrical curcuits or use electrical test equipment , we should know some do's & dont's . This is where it's helpful to have a wiring diagram . You cannot know if a wire is routed to the PCM ( power train control module , the jeeps or cars computer) or somewhere else without this diagram. I once found out the hard way. I didn't have my jeeps wiring diagram at THAT time . I just wanted to trace the flow of electricity to confirm if a circuit was complete and found out later the line I probed fed back to the PCM . Not cool . When you ask a 12 volt test light to draw 12 volts from a wire that only flows 5 volts or less , you create an overdraw condition. You also risk burning up something in that circuit. Just want to help you understand how we must be cautious and not cause further damage. Please tread lightly. If you want to poke your head under the dash around where the steering column is with a flashlight just to inspect , feel free . Do be cautious what you touch and please don't use something metallic to probe . Circuits may be live. You may see folks touch screwdrivers to something and make sparks in their testing and repair but let's be careful of that . Ok , inspection is the key here . Hope you can obtain a wiring diagram . You won't need the entire vehicle just engine electrical and what pertains to under the dash may be suffice . Hoping this helps and the problem is found soonest. Your welcome to post back anytime . It's ok to try this yourself but please observe cautions . When handling wiring , think of it as a girls hair . She dosen't like it pulled . We have to be gentle in that way or we cause more problems to our vehicles . Best of luck and post back any questions or findings .