If your turn signals fail, you should use ____ to indicate that you are turning.

  1. Your horn
  2. Your headlights
  3. Hand signals ✓
  4. Your emergency flashers

Answer: C. Hand signals

If your turn signals fail, use hand signals to show that you are turning.

Why this is the answer

The handbook says you may signal either with your turn signal lights or with hand and arm signals, and it describes how to give a hand signal by extending your arm well out the window where others can see it. It also notes that hand signals are hard to see in the dark, which is why your signal lights need to be working. So when the lights fail, the hand and arm signal is the backup the handbook points to, given in plenty of time and held until others read your intention.

Why the other answers are wrong

Remember it

Think of your arm as the spare bulb: when the light won't blink, put your hand out the window so others still read your move.

Official handbook: Texas Driver Handbook (DL-7), Chapter 5: Signals, Signs, and Markers , p. 38

Explanation drafted with AI (deepseek-flash) from the official handbook passage cited above, then checked automatically and by a second model on 2026-10-23. Always confirm with the official handbook.