i had a problem similar to this not long ago. headlights came on with switch off and nothing on either of my multifuntion stalks worked (dome lights, wipers, blinkers, ect.) but all my gauges did work. replaced the left multifunction stalk and it fixed the problem. word of advise on replacing this part, go to the dealer i got out of there for under 50 bucks when Napa wanted 125+. didnt really check online tho. as far as the gauges not working, in my research of my particular issue i found that some people had their TIPM (totally integrated power module) fry. one poor guy even had his jeep catch fire when the TIPM imploded. it controls pretty much everything on the jk's and is a part of the fuse block under the hood, under all the fuses there are 5 large harnesses connecting to it if i remember correctly
cross threading is as good as locktite!