Joe,
I had a similar problem a month ago. I lost the head lights and the emergency brake chime was sounding when in gear and e-brake off. Other forums recommended replacing the head light switch and e-brake pressure switch. The inexpensive 1960s vintage GM headlight switch came first so I replaced it. Headlights still out. I found a u-tube video on troubling the headlight switch. The headlight switch has two power sources, parking lights and headlights. I determined that there was no voltage on the headlight power pin. The headlight fuse in the Monaco 2 fuse block was not blown. Out of desperation, I decided to check all of the connections to Monaco 2 fuse block which required removing the screws attaching it and the cable bundles to the bulkhead below the main fuse panel. I scraped some congealed grease from the four power pins on the top of the fuse block, reset all of the other connectors, and removed and reset all of the fuses and relays. After putting everything back together, BOTH PROBLEMS SOLVED!!
I have since gone back and cleaned all of the external connections to both Monaco 1 and 2 with contact cleaner and lightly greased the pins with dielectric grease. Hopefully, this will alleviate my other phantom electrical issues like the wiper running without being switch on and the exhaust brakes causing the tach and speedo to go to zero and dash alarms.
Dennis Y
2004 HR Ambassador/2005 Jeep LJ Rubicon