Occasionally, on my daily driver 1985 Vanagon, I get these two lights....

They flicker so lightly you think its only your imagination but then they flicker again.

My alternator appears to be OK, although I've not had that checked yet - but I'm still cranking good and its cold here in Ga.

So....what does this mean?  Does the Oxy + Batt. lights "always" work/light together?  If its the OXY, how do you re-set this....my van has lots of miles and I've never re-set the OXY "box"....

Educate me please ....

Larry 
Ga.