Right got a problem with driver door light (Bottom right) staying on even when door is closed and locked, I'm not sure if these are connected but the central locking system doesn't seem to be working properly either, using the key fob have no problems with opening the car but can't lock it, have to use the key manually.

But when my partner started messing around with the door latch he seemed to knock the U shaped piece back into the door (Where it got stuck for some time so we couldn't close the door at all!) the light turned off. After pulling the interior door handle and the latch re-jigged itself back into place (As if the door was locked) the light came back on.

Could this fault have anything to do with the latch perhaps being out of line or stiff in some way? We've sprayed it with wd40 to see what that would achieve but nothing! It seems I can have the ligvht off but not able to close the door or vice versa

Someone please help!

Simple terms please I know nothing about cars!!