You can access all the wiring that goes into the door under the
fusebox, however, when I had an alarm/keyless entry system installed
in an 87 we couldn't get it to work with the VW central locking
actuator.  The VW actuator doesn't work like typical cars.

If anyone has gotten keyless entry to work with Vanagon power locks
without opening the drivers door, please share your tricks.

I had to install an aftermarket actuator into the drivers door to
move the VW mechanism.  This required a couple wires going from the
acutaor inside the drivers door to the alarm brain under the dash.
(Aftermarket actuators are available from any auto stereo shop or
ebay).

>Okay, I'd like to add a keyless remote/alarm and maybe
>starter feature to my '91 Westy and want to know if
>the wiring needs to be run through the doors or can
it all be done up front under the dash?