Have you got it plugged in on the transfer case?
The switch on the transfer case grounds the end of the wire. It is fairly easy to test its function without removing it with a 12V test bulb and long leads. Connect on eend to teh battery positive and see if you can get the bulb to light up when connected to the switch or the harness going to it.
BagusJeep lives in Bali.
1981 CJ7 258ci - Bagusjeep
1984 CJ7 258ci - Puthijeep
1981 J20 258ci - Gladys
1951 Willys CJ3A/MB/M38 - Little Willy
1995 Cherokee 4.0 - CHEROKEE