Symptoms
- Clicking sound is heard when activating turn signal
- No exterior or dash indicator lights flash at all
- Both sides are affected simultaneously
- Hazard lights may also be affected since they often share components
Likely causes
- CommonFailed turn signal flasher relayThis relay controls the flash timing and can fail even while still producing a clicking sound in some cases.
- CommonBlown fuse for the turn signal circuitA shared fuse failure can disable all turn signal lights while other functions work.
- PossibleFaulty turn signal switch on the steering columnThe stalk switch itself can fail while still producing a mechanical clicking sound.
What to do
- Check the fuse box for a blown turn signal fuse and replace with the correct amperage.
- Locate the flasher relay and try swapping it with an identical relay from another circuit to test.
- Test hazard lights too, since they often share the same flasher relay as turn signals.
- If the clicking sound seems to come from the dash rather than the relay location, suspect the turn signal stalk switch.
- Check all exterior bulbs for signs of failure, even though this is less likely if no lights work on either side.
- Avoid ignoring this issue, since it significantly reduces your ability to safely signal turns and lane changes.
- Have a shop replace the flasher relay first, since it's the most common and inexpensive cause.
- Have the steering column switch inspected if relay replacement doesn't resolve the issue.
Tools and parts
- Fuse puller or pliers
- Replacement fuses
Turn signal/hazard flasher relaySearch: “flasher relay for [your car make model year]”
When to call a pro
A shop can quickly test and replace the flasher relay, which is one of the most common and inexpensive fixes for this exact symptom.
Safety
Use caution
Driving without functioning turn signals is a serious safety hazard; avoid driving until this is fixed or use hand signals if you must drive short distances.