Turn signals don't work on either side

Symptoms

• No turn signal lights flash on either side of the car
• Dash indicator arrows don't light up when signaling
• Hazard lights may or may not still work depending on the shared circuit
• Other lights (headlights, taillights) work fine

Likely causes

• CommonBlown turn signal fuseA single fuse often controls all turn signal functions across the vehicle.
• CommonFailed flasher relayThis relay controls the flashing for all turn signals and can fail as a single point of failure.
• PossibleFaulty turn signal switch on the steering columnA completely failed switch can disable both directions at once.

What to do

1. Check if hazard lights still work, since this helps narrow down whether the fault is shared with hazards or specific to turn signals.
2. Check the fuse box for a blown turn signal fuse and replace with the correct amperage.
3. Locate the flasher relay and try swapping with an identical relay from another circuit to test.
4. Test the turn signal switch by trying both left and right positions multiple times.
5. Listen for the switch's mechanical click, which suggests it's engaging even if lights don't respond.
6. Avoid driving without functional turn signals; use hand signals only if absolutely necessary to reach a repair location.
7. Have a shop replace the flasher relay first, since it's the most common and inexpensive cause.
8. Have the steering column switch inspected if relay replacement doesn't resolve the issue.

Tools and parts

• Fuse puller or pliers
• Replacement fuses

When to call a pro

A shop can quickly test and replace the flasher relay, which is one of the most common and inexpensive causes of both signals failing.

Safety