Had headlights, then high beam only, now nothing

Dont rule out bad bulbs till you have tested them. Long shot but maybe you are running to high a voltage an burnt out the low beam then switched to high beam and burnt them out as well.
Mymopar.com has free pdf of wiring diagram that you can enlarge

I appreciate that. Here's what happened today. I had ordered a headlight switch through O'Reilly's (same Standard P/N and it was supposed to be in today. It wasn't. I had been told that there were 2 of the headlight switches at a Main O'Reilly's in North Little Rock (I'm in Arkansas, in case that was missed). North Little Rock is at least an hour to an hour & a half. So, I decided to make the trip, since it was during the day & go get a switch myself. So, I did that. On my way home, I had to stop by and pick up my Wife from work anyway. Before we got home, I had to also pick up my Daughter, from a friend's home. And, on the way there, there was a series of speed bumps and one snuck up on me. and it jarred the front of the car pretty good. Anyway, we got home & I went to replace the switch & did so. so I had high beam, but no low beam. I started the motor and on high beam, no problem, but on Low beam, there was a heavy discharge & the motor was running a little rough, on low beam. So then, I thought that maybe I had knocked one or both of the low beam elements loose. So, I pulled both headlight bulbs (sealed beams) and checked each one, individually and they checked out great. Also, I have 2 dimmer switches (the original & a spare used one. I get the same issue with both. One thing I did notice and didn't really think anything about it. The new switch has a terminal on the metal cover plate, where the original one didn't. I am sure it would be a ground. Could THAT be causing my problems that I am having now? Also, isn't there a headlight relay, on here somewhere? I will check out that wiring diagram too, Thank you for that. I do need to enlarge it some, the others, are like "Fine Print" to me. Appreciate all the input I can get too, Thank you folks