Symptoms
- Taillight flickers intermittently, especially over bumps
- Flickering worsens with braking or turn signal use
- Other lights on that side may flicker too
- Issue is more noticeable at night
Likely causes
- CommonLoose or corroded bulb socketA poor connection at the socket can cause intermittent flickering, especially over bumps.
- CommonBulb nearing end of lifeBulbs often flicker before fully burning out.
- PossibleDamaged wiring near the taillight housingWear or a previous repair can cause an intermittent connection.
- PossiblePoor ground connection affecting that side's lightingA bad ground can cause erratic behavior across multiple lights on the same circuit.
What to do
- Check the bulb and socket for looseness or corrosion, and reseat firmly.
- Replace the bulb if flickering continues, since aging bulbs often flicker before fully failing.
- Check if other lights on the same side flicker too, which could point to a shared ground or wiring issue.
- Inspect the wiring harness near the taillight for any visible wear, especially at the trunk hinge area.
- Test the light after each fix attempt to confirm the flickering has stopped.
- Avoid ignoring flickering, since it often precedes a complete light failure.
- Have a shop check for a ground issue if replacing the bulb and cleaning the socket don't resolve it.
- Get wiring at the trunk hinge inspected if flickering seems linked to opening/closing the trunk over time.
Tools and parts
- Flashlight
- Screwdriver or trim tool
Taillight bulbSearch: “taillight bulb for [your car make model year]”
When to call a pro
If wiring at the trunk hinge is worn from years of flexing, a shop can repair or replace that section of harness.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.