1. Verify Fuse Integrity:
* Multiple Fuses: Even though you've checked them, double-check *all* fuses related to the taillights. There might be a separate fuse for the left and right side, or even one for running lights versus brake lights. Consult your owner's manual for a complete fuse box diagram. Don't just visually inspect; use a test light or multimeter to confirm continuity (a complete, unbroken circuit) across each fuse. A blown fuse might look okay but still be faulty.
2. Test for Power at the Lights:
* Test Light: With the car's ignition switched ON, use a test light to check for power at the taillight sockets themselves. Probe the appropriate wire (usually black or dark-colored for ground, and a different color, often red, for power) at each light. If you don't have power at the socket, the problem is before the bulb. If you have power, the bulb is likely the culprit.
3. Wiring Harness Inspection:
* Common Break Points: Look closely at the wiring harness where it enters the trunk and the areas where it bends or flexes significantly. These areas are prone to chafing and wire breakage.
* Ground Connection: A poor ground connection can prevent the taillights from working. Locate the ground wire for the taillights (often a braided wire connected to the chassis). Clean it thoroughly with a wire brush and ensure a secure connection.
* Bulkhead Connector: Inspect the large connector(s) that pass through the firewall/body. These can get corroded or damaged.
4. Switch and Wiring:
* Tail Light Switch: While less common, the tail light switch itself could be faulty. This is usually located on the steering column. You'll likely need a wiring diagram to test the switch accurately.
* Wiring Diagram: A wiring diagram specific to your 1996 Camaro Z28 is crucial at this stage. This diagram will show you the exact path of the electrical circuit and help you trace the problem. You can often find these online (via a parts store website or a Camaro forum).
5. Bulbs (After Power Check):
* Test the Bulbs: If you have power at the sockets, test the bulbs themselves using a known good bulb. Sometimes a bulb can appear fine but be internally broken.
Important Notes:
* Safety First: Disconnect the negative battery terminal before working on the electrical system.
* Multimeter: A multimeter is a more precise tool than a test light and can measure voltage directly.
* Professional Help: If you're not comfortable working with car electrical systems, it's best to take your Camaro to a qualified mechanic.
By systematically following these steps, you should be able to pinpoint the cause of your taillight problem. Remember to consult a wiring diagram for your specific year and model Camaro Z28 for the most accurate troubleshooting.
