Due to what Frank says below this would be a great project for someone with
a digital camera to take photos of the fix and a link to a web page with
instructions. Are any available yet for the door lock repair? There are so
many good pages now such as Tom's page on CV repair and Harald & Nancy's
page on the auxiliary battery.

William

 Andy, this is a common problem with the electric door locks.  Most
likely what is happening is that the electrical contacts inside one or both
of the front door motors are corroded.  You must remove the motors and
carefully open them.  Clean the contacts with electrical contact cleaner and
then lube them with Dielectric Grease.  Reassemble the motors and reinstall
and all should be fine.  Just be careful when opening the motor so as not to
lose any of the small bits and make note of how all is before removing any
part.  There are no diagrams on how the assembly is.

Cheers

Frank Condelli