1990 – 1996 Corvette Instrument Dimmer Photocell Fix
How to Replace the Heatercore on a C3 Corvette
Sunlight, heat and age conspire to destroy the photocell, which controls the brightness of the cluster when the headlights are off. If your cluster is dim even when the headlights are off, then the photocell may need to be replaced.
Photocell Repair Kits are available from batee.com for about $20, and the repair is super-easy!
Go to batee.com for complete written instructions and the parts to complete these repairs.