If it is the same as Swift which I had the three lights are mounted into a large grey plastic housing which is screwed to the back of the van. The only way I could gain access was by removal of the whole assembly which then allowed direct access to the bulbs. To remove the assembly I drilled a small hole about 1mm diameter into the grey plastic buttons which cover the two fixing screws, then screwed a wood screw into the hole about 1 turn, just enough to catch into the button. I then used a pair of pliers to pull the screw which pulled out the button which then gives access to the fixing screws behind the button. The screws are easily removed but be careful not to dislodge the "rawl plug" type fitting which is fitted to the body. These "rawl plug" type fittings seal the van so it is critical that they are not damaged or misaligned. The whole assembly will then be free and hanging on the cables. When I reassembled I put a dab of silicon on the underside of the button to seal the hole drilled earlier.
