I have a 73 Nova, My red lights on the dash work, But my speedometer lights don't work, What could be the problem.
pull the instrument cluster out and start changing the bulbs.
this is assuming you have checked the wiring and any applicable fuses.
Bulbs wear out over time. After 41 years, bulbs may have reached their life limit. Not the car though, just replace the bulbs, make sure you clean the contacts as they have gotten a bit corroded over this life span. If that does not fix it, check to see if you have electricity flowing through the wires. (If other bulbs are working you do.) Check the fuse, Ground wire and wires themselves. If you pull the dash, change all the bulbs. You may find the replacement bulbs will not last until 2055.
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