My passenger door latch just stopped operating from the inside door handle. I have taken the door panel off & the link it still attached & seems to be doing what it should but there is something wrong with the part that latches over the striker, it only clicks on the second position (closed) & not the first one (safety) There are 2 parts to this latch lever, the front part does what it should but the back part doesn't move like the one on the other door.

I have never had any luck with removing this latch unit & thought I would ask here as there must be an easy way. I really struggle with the links that have to come off to get the latch out of the door so any help with an order of attack would be much appreciated, Thanks