The fix for this was kindly offered by Rich Rodriguez.

What you have to do is go to your main Effects folder and open up the .FX files used by the DF727 with notepad. Once you find them add this line underneath (Properties) : Cockpit=1
Your file should look like this:

(Library Effect)
Lifetime=5
Version=2.00
Radius=-1

(Properties)
Cockpit=1 <----New Line
VirtualCockpit=1
Spot=1
Tower=1
Map=1

These are the effect files you need to look for and edit:
fx_navredh,
fx_navgreh,
fx_beaconh,
fx_navwhi,
fx_beaconb,
fx_df727_strobe,

After that you will be able to view the navigation lights from your Passenger wing views and any other view from the 2D cockpit.