New Radio Kills Dash Lights!

[Charles Schwartz <cschwart@stern.nyu.edu>]

I installed a new radio into my '86 4000 over the weekend.  I was able to
identify the speaker wires fairly easily, but I had some trouble with the
power wire.  There was a 4 wire connector to the back of the radio.  The
colors were brown, red, grey/blue, and white.  I got current from the red,
and ground from the grey/blue. The white was related to the chime.  I don't
know about the brown.  Anyway, now I have no dash lights.  

Help!

Charles