Hey Nick
The door switch is part of the side door lock.
and connects to the van via the contacts on the sliding door and main pillar.
No van to take a pic ATM . . . . . . but . . . .
So give the contacts a clean and give the lock a good TAP.
OEM Data below:
Removing contact strip
– Unscrew bolts -2- and pull contact strip -1- out of B-pillar -3-.
– Disconnect electrical connector.
Removing contact module
– Unscrew bolts -5- and pull contact module -4- out of sliding door -6-.
– Disconnect electrical connector.
Installing
Install in reverse order, but note the following:
– Screw contact module -4- with bolts -5- finger-tight to sliding door -6-.
– Close sliding door -6- once.
The contact module -4- is then centred by the contact strip -1- in the B-pillar -3- .
View attachment 31557
and remote lock mechanism.
View attachment 31558
and the leccy bits look something like this,
View attachment 31559
.
If all that fails, it may the switch faulty in the lock mechanism.
which on a 2017 van would mean a warranty visit to the dealers for a replacement door lock unit. as replacing the internal switch will be a nightmare.
.
.