1. Check the Dome Light Switch:
* Location: This switch is usually located on the overhead console or in the light fixture itself. It might have different settings (on, off, door). Ensure it's in the correct position ("door" or "on").
* Test: If the dome light has a separate switch, try forcing the light on manually to see if it works. If it does, the problem isn't the bulb or the main wiring, but the door switch or its connection.
2. Inspect the Door Switches:
* Location: Each door has a switch in the door jamb, usually near the striker plate (the metal part the door latches onto). These are often simple mechanical switches.
* Test: This is where things get a little more involved. You'll need a multimeter (or test light) to check for continuity.
* With the door closed: The switch should be open (infinite resistance, no continuity).
* With the door open: The switch should be closed (near zero resistance, continuity).
* Testing procedure: You'll need to access the wiring harness connected to the switch (often requires removing the door panel). Disconnect the harness from the switch. Put your multimeter on the continuity setting and test the switch contacts. Open and close the door to see if the continuity changes as expected. If not, the switch is faulty and needs replacement. If the continuity changes correctly, move on to the next step.
3. Examine the Wiring:
* Inspect the wiring harness: Check the wiring harness that runs from the door switches to the interior light fixture. Look for any visible damage, breaks, or corrosion. Pay close attention to where the harness enters the door. This is a common point of failure due to flexing.
* Continuity test (advanced): If you suspect a wiring problem, you can use a multimeter to test continuity between the door switches and the dome light fixture. This requires tracing the wires. A wiring diagram for your specific year and model Silverado is very helpful here (available online or from a repair manual).
4. Check the Interior Light Fixture:
* Bulb: Make sure the bulb itself isn't burnt out. Replace it with a new bulb of the correct type if needed.
* Fixture: Less common, but the fixture itself could be faulty. While less likely than the switch or wiring, it's worth considering if all else fails.
5. Ground Connection:
* Check the ground: A poor ground connection can prevent the dome light from working. Locate the ground wire for the dome light and make sure it has a solid connection to the chassis.
Important Considerations:
* Repair Manual: A repair manual specific to your 1995 Chevrolet Silverado will be incredibly helpful in providing detailed diagrams and procedures.
* Safety: Disconnect the negative battery terminal before working with any electrical components in your vehicle to prevent accidental short circuits.
* Professional Help: If you're not comfortable working with car electrical systems, it's best to take your truck to a qualified mechanic. Incorrect wiring can cause further damage.
By systematically checking these components, you should be able to pinpoint the cause of the problem and get your interior lights working correctly again. Remember to be patient and methodical in your troubleshooting.
