David,
    Yes those were the ones I followed, to a tee.  Upon further
investigation here is what I have.

One 10ga or so red wire from aux battery.

One red wire in sheath that comes from front of van...always hot.

One blue wire that is dead whether motor running or not.

I sus pect that this blue wire is the culprit, but I loaned my Bently and
Haynes to a friend, and cannot view wiring diagrams at present.  Where does
the blue wire go from under the drivers seat?  It must be broken or pulled
loose along its travel.

The blue wire should come on when the alternator is charging, correct? When
it sends a current, it flips the relay, and thus charges the battery,
correct?