Mitsubishi L200 2.5TD 2002 Diesel Pickup - Door ajar w/light and interior light not working - kennymcd

Hi,
My door ajar warning light on dash does not work when I open the doors. I have checked the roof lamp and door switches. The warning light illuminates if I earth the relative wire at the lamp but it won't work from any of the doors. Can anyone help me with this problem. Thanks

Mitsubishi L200 2.5TD 2002 Diesel Pickup - Door ajar w/light and interior light not working - elekie&a/c doctor

Does the roof light work with manual switch turned on?could it be a blown fuse?