* Power Source: The lights receive power from the car's electrical system, ultimately from the battery. However, this isn't a direct connection.
* Dimmer Switch: A dimmer switch controls the brightness of the dash lights. This switch regulates the amount of current flowing to the lights. It's usually located on the dashboard, often near the headlight switch.
* Illumination Circuit: A dedicated circuit is responsible for powering the dash lights. This circuit is wired to the dimmer switch and then to the individual dash light bulbs. The circuit likely includes a fuse to protect it from overloads.
* Headlight Switch (often interconnected): In many older cars, including some 1960 Impalas, the dash lights are tied to the headlight switch. Turning on the headlights often also illuminates the dash lights, usually at a higher brightness setting than the dimmer switch allows. This is a common design choice to provide illumination when driving at night.
* Bulbs: The individual dash lights are incandescent bulbs, meaning they glow when electricity passes through the filament. If a dash light isn't working, it's likely a burnt-out bulb.
* Grounding: A good ground connection is crucial. The lights need a complete circuit; power in, light out, and a path for the electricity to return to the battery (ground). A loose or corroded ground connection can prevent the lights from working correctly.
Troubleshooting a non-working dash light:
If your 1960 Impala's dash lights aren't working, here are things to check:
1. Bulbs: Check each bulb to make sure it isn't burnt out.
2. Fuse: Check the fuse associated with the dash light circuit in the fuse box.
3. Dimmer Switch: Make sure the dimmer switch is functioning correctly. Test it in all positions.
4. Headlight Switch (if applicable): Try turning the headlights on to see if the dash lights come on as well.
5. Grounding: Check for any corrosion or loose connections in the grounding system.
6. Wiring: Inspect the wiring harness for any broken or frayed wires leading to the dash lights. This is more involved and may require some electrical knowledge.
A wiring diagram specific to your 1960 Impala will be invaluable in troubleshooting. You can find these diagrams online or in a repair manual for your car.
