Glow plug fuse is blown. Dealer item. Small metal strip held in by two
screws under a small black panel. NO IDEA where to tell you to look on you
van, on my Jetta TD it is on the back of the firewall. Follow the thick
red/white wire back from the glow plug harness to wherever it leads.

As this piece of metal (fuse) is exposed to the elements, I don't feel it
is a cause for alarm that it blew. If you put in the new on and it blows,
find the problem and ignore it, right away.

Best of luck,

G. Matthew Bulley
Principal
Bulley-Hewlett & Associates
Communications for Organizational Development
www.bulley-hewlett.com
(888) 468-4880 toll free