Had some spare time and its been raining so I decided to change the door actuator on the passenger door of the car as the existing one hasn't been able to unlock electrically since getting the car and the spare I bought has been sitting under the seat for about 6 months.
I did the job without any fuckups. Get the door apart without breaking clips, get the old one out without too much swearing despite the tight spaces, get the new one in. I tested it all and found I had missed the rod to activate the external unlock with the key. No worries, I loosen things off and I can get the last rod back in place. I check again and everything works.
So I put it all back together, put the trim on, put all the fasteners back in position and think what a good job I've done. I move the car back out from under the carport and notice that the door ajar light is on. I slam the door which seems to make it flicker but no more than that. There didn't seem to be any adjustments I could make but I loosen the accessible bolts and try a few more things to try and get the light to go off. I try to get the thing to go off by probing in there with a screwdriver just to figure out what part of the mechanism does it. I pick up the old part and try and figure out what the sensor whas in. While looking at it I notice that there are only 2 pins in the connector, the sensor must be somewhere else? I look at the door and I'm still pretty certain that the sensor is not even part of the door and is the pushbutton on the pillar which does nothing when I poke it with my finger, but how could that fail now? Maybe I missed reconnecting some wires on the door but I can't think of any wires I missed?
So after 1.5 hrs of going crazy and slamming the door trying to figure it out without taking all the trim off again I realise that the rear hatch (boot) isn't closed properly. I close that and all is good again.