Why does my headlight work but my turn signal doesn't?

Short Answer: Different bulbs, different circuits — check the flasher relay or the bulb type.

Detailed: Headlights and turn signals use separate:

• Fuses (headlights often 10–15A, turn signals 5–10A)

• Relays (turn signals use a flasher relay — either thermal or electronic)

• Bulbs — turn signals are often dual-filament (parking + turn) or separate

Common failures:

• Flasher relay dead (no clicking sound)

• Wrong bulb type (single vs. dual filament)

• Bad ground at the turn signal socket

• Hyper-flashing (fast blinking) — indicates a burned-out bulb or LED bulb without a load resistor

Fix: Listen for the relay click. If it clicks fast — bad bulb. If no click — bad relay or no power to the circuit.