* Faulty Dome Light Switch: The most straightforward cause is a malfunctioning dome light switch. It might be stuck in the "on" position, even if you think it's off. This would draw power, potentially overloading the circuit and causing the dash lights (which are likely on a different, lower-capacity circuit) to shut down as a protective measure (fuse or circuit breaker tripping, but not necessarily blowing a fuse).
* Short Circuit in the Dome Light Circuit: A short circuit somewhere in the wiring leading to or from the dome light could draw excessive current. This short could be in the wiring harness itself, a bad connection at the switch, or even a short within the dome light fixture itself.
* Bad Ground: A poor ground connection can cause erratic electrical behavior. A bad ground could be interfering with the power supply to the dash lights while allowing the dome light to operate (albeit incorrectly). This is particularly likely if other electrical components are also acting strangely.
* Fused Circuit: While it seems counterintuitive since the dome light is on, it's possible a fuse protecting the dash lights has blown (or is intermittent) due to an overload caused by the short circuit mentioned above. This fuse *could* be related to the dome light, or another device which shares the same circuit. Inspect your fuse box carefully.
* Failing Voltage Regulator (Less Likely but Possible): In some cases, a failing voltage regulator (part of the alternator system) could cause fluctuating voltage, leading to some lights staying on while others fail. This is less likely to be the primary cause in this situation, but should be considered if other electrical issues are present.
* Wiring Harness Issues: Damaged or corroded wiring in the harness can cause intermittent problems, leading to unexpected results like this. This is often related to age and exposure to the elements.
Troubleshooting Steps:
1. Check the Dome Light Switch: Try turning the dome light switch on and off multiple times. See if you can feel any resistance or unusual behavior. If possible, temporarily disconnect the switch from the wiring harness to see if the dome light turns off.
2. Check the Fuses: Carefully inspect the fuses in your fuse box, paying close attention to any fuses related to the dome light and the instrument panel lights. Replace any blown fuses.
3. Inspect the Dome Light Wiring: Visually inspect the wiring leading to and from the dome light for any signs of damage, fraying, or corrosion.
4. Check the Ground: Locate the ground connection for the dome light and the instrument panel lights and make sure they are clean and secure.
5. Test the Voltage: Use a multimeter to test the voltage at the dome light socket and the instrument panel lights. This will help determine if there's a power supply issue.
If you are not comfortable working with car electronics, take your Camaro to a qualified mechanic for diagnosis and repair. Incorrect wiring can lead to further damage.
