Originally Posted by Tfain
I'm asking where should that wire be. The black one hanging to the right
If you have the wiring schematic from www.offroaders.com
you can find it marked on the light switch at terminal 16.
It is a ground for the courtesy lights, which are fed from the same switch via an orange wire at 51. I do not see an orange wire so I presume you do not have courtesy lights fitted.
You really do need to look up that scheamtic and print it out and keep it to hand to understand where all those wires are going and what they are for, as well as a few bits of basic test equipment.
Are you getting a feed from the white wire on the switch at terminal 19? That feeds the parking lamps.