90 A/C head unit quits then interior illumination

[Steve Ensch]

My climate control head unit finally quit after working intermittently for
about 3 days. But now after driving around with the control unit removed the
interior illumination just quit.  Fuses are good but I am thinking this
sounds similar to the other thread going around the list concerning the 90Q
with illumination problems.  Any ideas?  Or do I have to take the dash out.

steve