Sue, after a bit of searching I've found what I posted "somewhere else" back in late Aug 2013. It may help:-
Fitting the new one was a bit time consuming, but basically entailed:-
- remove the wooden strip trim in the wardrobe where roof material meets walls.
- remove staples that hold roof material.
- locate wires.
- remove exterior light, cutting wire as close to bulb fitting as possible.
- clean surrounding area.
- drill extra mounting holes in new light body to save more holes in van.
- solder ends of wires on new light to existing wiring and wrap tape over the joints. [you may need to cut back two duplicate original wires, or be able to use existing wire terminals instead of soldering, depending on length of wires.
- seal/tape over any holes not needed.
- fix body of new light to van using short stainless screws and a bead of sealant along top edge. [do NOT seal bottom edge as this will allow any water that did enter a route out]
- slide the led strip into place and push fit end caps, again with a little sealant.
- inside re-staple lining and fix trim
Colin