* Headlight switch: A faulty switch is a common culprit.
* Wiring harness: Worn or damaged wiring, particularly in the flexible sections near the headlight assemblies, is a frequent cause of failure. This includes the connections at the headlight motors themselves.
* Headlight motor(s): The motors themselves might have failed.
* Relay: Although not a dedicated "pop-up" relay, the headlight circuit uses relays, and a faulty relay could cause the problem.
* Blown fuse in the main headlight circuit: Check the fuses related to the headlights in the fuse box (both under the hood and possibly inside the car). A blown fuse in the main headlight circuit would prevent both the headlights and the pop-up motors from working.
Before replacing any parts, you should:
1. Check the fuses: Start by checking the fuses related to the headlights in your owner's manual.
2. Inspect the wiring: Look for any obvious damage to the wiring harness, especially around the headlights and the area where the headlights retract into the body.
3. Test the headlight motors: If you're comfortable working with car electrical systems, you might be able to test the motors directly with power to see if they're functional.
If you're not comfortable diagnosing electrical problems yourself, it's best to take your Corvette to a qualified mechanic.
