You have more than one problem but start with drivers side rears. Remove the lens and remove the three mounting bolts for the tailight assy. The assembly gets its ground from the tub. So clean up wher the three bolts mount and renstall.
The amount of chasing you are doing may have upset a wire harness connection so check all again. As for the passenger side steady indicator on the dash points to a bulb not working. Get some new bulbs and see what that does. The running light on the passenger side needs to be checked if it is still a goood bulb and where is the ground?? I don't remember. Best I got.
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.
AF Jeep Club Tail Number 184