I noticed some bulbs were out on my 66 chevelle and went to change them and when I did they still did not work. I bought the car last week so I don't know if they ever worked. One bulb in the dash does work as well as the turn signal bulbs which means a very dim dash at night. I am going to test the wire with a test light but if the test light does not light up what are my options? I would really like to have a fully lit dash.