'91? The dash guage cluster had both rear illumination lighting and front lighting too. Since I never had a Z before --- didn't realize this wasn't common on many other models. The front cluster lighting had a couple of bulbs setup like stage footlights throwing an orangy glow on the guages -- looked really bad. Pretty easy to take those bulbs out when I had the cluster removed to eliminate them. Maybe it was just an issue with '91 2+2's -- don't know???