"Working Lights" EX RAC 08 Transit

[ocmbraintree]

Hi guys,
I bought an Ex RAC Transit, T330s and it seems to have some more lights in it than standard that would come in handy for me.. One on the tail door, 3 inside the back.. they don't turn on and i've tried every switch. In the back near the passenger side tail column there is a standard light switch they use for houses? Has anyone come across this before and what to look for? Any advice would be appreciated?
Thanks

[lockiejohn]

is thee seperate switch on the lights there one in back of my ex rac with a switch on the light itself