'93 90 seat heater switch light

[crossley family <crossley@northwest.com>]

Can anyone tell me the specs and a source for the seat heater switch
light
for a '93 90q?  I have taken the expired bulb out of the switch thinking
it was a LED, but once out it looked more like a red mini incandescent
bulb what with its skinny round lead wires.  The voltage to the device
varies from 0 to 0.25 volts depending on the potentiometer setting for
the dash lights.
TIA  
Kent Crossley, Portland,Or.
'91 200q (mine)
'93 90CSq (hers)