Drove my 1999 Cherokee home, parked in the driveway and went out a couple hours later and when I turn the key the door buzzer and radio quit working. No crank. Then after a few minutes the power comes back on and tried it again with same outcome.

Battery tests good, new starter and solenoid. Ignition relay continuity tests good, swapped out with another 5 pin relay and same.

Just pulled out the NSS.......after several hours later and in more then one piece! If it wasn't broke it is now. I'll replace it in the morning.

What else could I be missing? Any thoughts would be greatly appreciated. My skill level is beginner when it comes to electrical systems and diagnostics.

Thank you.

 

I'd start by checking your battery leads and ground points for any corrosion. When inspecting these connections, don't just look at them, undo them and give everything a clean.

 

Yep. Those are classic bad connection symptoms.