Is the connector pushed fully home, they need more force than you might expect to fully lock. I did this on both my front locks after changing them, the new locks worked fine, but no puddle lights or warning buzzer from drivers and no puddle light and glove box light from the passengers. Ripped all the butyl seal back out and sorted the drivers door, but never bothered with the passenger side. If it isn't that then VCDS might find implausible signals on the central locking and give you a clue what's wrong.