Simple Issues (Easy Checks):
* Parking Brake Engaged: The most common cause. Make sure your parking brake is fully released. The light is often tied to the parking brake switch.
* Bulb Burned Out: While it seems counterintuitive, a burned-out bulb in the parking light circuit *can* sometimes cause the dash light to stay on. This is due to a short circuit or faulty wiring in that circuit. Check all your parking lights (front and rear).
* Loose Bulb: A bulb that's not seated properly might create a faulty connection and trigger the light.
* Faulty Switch: The parking light switch itself might be malfunctioning, stuck in the "on" position, or have a faulty connection.
More Complex Issues (Require More Investigation):
* Wiring Problem: A short circuit, frayed wire, or corroded connection in the parking light circuit can keep the dash light illuminated. This requires tracing the wiring from the lights to the dash.
* Bad Ground: A poor ground connection somewhere in the parking light circuit can cause erratic behavior, including the dash light staying on.
* Faulty Parking Light Switch: As mentioned above, but this often means a replacement is needed rather than just adjusting a loose connection. This switch is often located near the steering column.
* Instrument Cluster Problem: In rare cases, the issue might lie within the instrument cluster itself. A faulty circuit board or connection in the cluster could cause the light to remain on even when there's no problem with the parking lights.
* Relay Problem (Less Likely): While less probable, a faulty relay associated with the parking lights could contribute to the issue.
Troubleshooting Steps:
1. Start with the Simple: Check the parking brake first. Then examine all parking light bulbs and ensure they're properly seated.
2. Visual Inspection: Carefully inspect the wiring harness for any obvious damage, corrosion, or loose connections, especially around the parking light switch and the bulbs.
3. Test the Bulbs: Even if they seem to be working, test them with a multimeter to ensure they have correct continuity.
4. Check the Switch: If the above steps don't solve the problem, you might need to test the parking light switch itself with a multimeter or replace it as a potential faulty component.
5. Wiring Diagram: Obtain a wiring diagram for your 1984 Chevy Silverado. This will help you trace the parking light circuit and pinpoint the source of the problem. (Haynes manuals are a good source).
If you're not comfortable working with car electronics, it's best to take your Silverado to a qualified mechanic. Electrical issues can be tricky to diagnose and repair.
