Wiring Overhead Console Help

I know this subject has been covered many times by many different people however my research on the subject continues to leave me baffled. I have a 1992 base model xj that i am adding the OHC into. i got the wiring harness and have found the proper connectors and rewired where necessary, however it the OHC compass/thermometer wont come on at all. once i tested it again ensuring all wires were wired correctly i tested with a test light and I'm not receiving any power to the plug in the factory plug in the xj. is there a fuse im missing. I checked all the factory ones with no solution inside and out. please help if you can.