- Faulty dimmer switch: The dimmer switch controls the brightness of the dashboard lights. If it is faulty, it can cause the lights to not turn on when the headlights are on.
- Blown fuse: A blown fuse can also prevent the dash lights from turning on. Check the fuses for the dash lights and replace any that are blown.
- Faulty light bulb: The bulbs may not be working properly or they may be loose in their sockets. It's important to check the condition of the dash lights and replace any bulbs if needed.
- Faulty wiring: There could be a problem with the wiring that supplies power to the dash lights. This can be a complex problem to diagnose and fix, so it is best to consult a professional mechanic.
