I have a 2002 impala and the dash lights just failed What switch are you referring to that may need be replace?

On a 2002 Chevrolet Impala, the most likely culprit for failed dash lights is the instrument panel dimmer switch. This switch isn't a simple on/off switch; it controls the brightness of the dash lights, and a failure within it can cause them to go completely dark. It's often integrated into the headlight switch assembly or a separate dimmer switch on the steering column.

While it's *most likely* the dimmer switch, other possibilities, though less frequent, include:

* Faulty Instrument Cluster: A problem within the instrument cluster itself (the gauge panel) could also cause this. This is a more expensive repair.

* Wiring Issues: A broken or corroded wire in the circuit leading to the dash lights is another possibility, although less common.

* Fuse: While less likely given that all dash lights failed at once, a blown fuse related to the instrument panel illumination is a possibility to check first.

To determine the specific cause:

1. Check the fuses: Locate the fuse box (usually under the hood or inside the car, often near the steering column) and check the fuse(s) related to instrument panel lighting. Your owner's manual will show you the fuse layout.

2. Inspect the dimmer switch: Try adjusting the dimmer switch – if it feels loose or unresponsive, it's a strong indicator of the problem. You'll likely need to remove the steering column bezel to get access to the switch.

3. Test the Instrument Cluster: This is more complicated and usually requires a professional.

Replacing the dimmer switch is often a relatively straightforward repair if you're comfortable with basic car repair, but replacing the instrument cluster is a more involved process best left to a mechanic. Start with the fuse check and dimmer switch inspection as they are the most likely and easiest solutions.