Yep.  Lots of posts on this one over the last couple of month/years/...
Assuming you have the same type A/C as an '87:  Probably clogged A/C
evaporator drain tubes...causing pan overflow down the sidewall,
make the carpet wet,
make everything wet. Take out carpets and let them dry.  Remove two back
top outside louvres--two screws, don't let them fall into well. Find tube.
Snip off clogged end of "evaporator" material. Watch gusher. If you're
really enthusiastic, send water up one tube and watch it come down the
other to flush the system and make sure it's free flowing.

BEST thing to do (which I'm about to) is to clip off the end of the
tube to get a good grip, and add an extention tube down to the outside
of the van somehow.  I think a hole needs to be drilled in the bottom
of the well, but I'm not sure.  Maybe someone can comment.

Cheers, Tom Neal

On Thu, 12 Aug 1999, David M wrote:

> I recently returned from vacation.
> During a rest stop after about a 75 mile drive with the a/c on, I
> noticed a leak from the the area at the rear bottom of the sliding door.
> The liquid appeared to be plain water (no antifreeze), it was air
> temperature (not hot) and the amount was about half a cup.
> Anyone know what this could have been? Condensation from the a/c
> somewhere?
>