84 Digifant (inline)  with previously correct behavior ..
   I know it's normal for these two lights to remain illuminated until I
rev the engine and activate the alternator... The present alternator is
perhaps 3yrs old...maybe 60 k miles.  I've replaced it one time, and I may
have installed new brushes in this one at some time past... can't recall if
it was this one or the last one.  I also recently re-tensioned the one
belt...no power accessories..and I have a new belt expected any day, not
bad, the current belt, but I think it is time...Anyway, everything is fine
in the belts, the waterpump and the alternator bearings, I checked when I
tightened the belt...But this afternoon after a day of no driving, I fired
it up...normal cranking, no squeal, but the two indicator lights remained
on as I drove off... I saw right away and blipped the throttle and the
charging system kicked right in...But that is NOT something I like to
ignore, since I may soon be heading back north through winter Nevada and
Oregon...
   So...What should I check?  I have some new brushes with me, but I'd
rather not remove the alternator here...In the desert sand....I will be
putting on the new belt when it arrives... I'm reading the usual charge
voltage, same as ever, at the coach battery 13.6v at idle...   Anything
else I should check that might cause a "sticky" charging system?  A relay,
or something?  I've got lots of those under my seat..😃.
   Otherwise, once I fixed the missing expansion tank rubber grommets, to
keep the fuel dry, the van has been like a champ thanks DH