I had a problem with my DA-6 only working with the timer pushed
in and turned , but not with the ignition on.  Robert Keezer led
me to the control relay behind the glove box.  I cleaned up the
contacts in that area, and it now seems to work okay.  I think
someone else mentioned a problem with theirs too.  You might
look there.

Bill
82 Diesel Westy
86 Wolfsburg Weekender