Make sure ILS is set (see above)
From HIS menu press data button
Press waypoint button. Waypoint 0 is current location
Press sequence button to add waypoint sequences (how many waypoints)
Press INS button in center console and add 1. Press enter ( +2, +3, etc)
Once waypoints are added press WYPNT on TDI switch.
Go to waypoint 1 , press UFC then POSN on center console and enter coordinate from F10 Map
You can press ELEV to add elevation of waypoint if desired. Select arrows in TDI to go to next waypoint.
Once waypoints are entered you can go back to HIS display and hit SEQUENCE for a waypoint map that can be followed.