The signal light is out on the dashboard but work on the outside.
There are a few possible reasons that will cause this issue. A blown bulb, faulty fuse (continuity check), a dimming rheostat, or a failed connection to the instrument cluster. In order to have the electrical system properly tested, I would enlist a certified mechanic to inspect your vehicle and determine what fixes are needed.
Have a car question? Get free advice from our top-rated mechanics.