The light bulb holders pick up their power by contacting the copper panel that is in the gauge pod. You will have to remove it and take it apart and clean all the connectors one at a time.
Six screws one connector and take it to the kitchen table. Disassemble everything and clean thoroughly and then reassemble install and you should have lights.
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