1. Check the turn signal switch. The turn signal switch is located on the steering column. If it is loose or damaged, it may not be making proper contact and causing the turn signal not to work. To test the turn signal switch, turn on the ignition and move the turn signal lever up and down. If the turn signal does not work in one or both directions, the turn signal switch may need to be replaced.
2. Check the turn signal relay. The turn signal relay is located in the fuse box under the hood. If it is damaged or not making proper contact, it may not be sending power to the turn signals. To test the turn signal relay, remove it from the fuse box and shake it. If it rattles, it is damaged and needs to be replaced.
3. Check the turn signal bulbs. The turn signal bulbs are located in the front and rear of the vehicle. If they are burned out, they will need to be replaced. To test the turn signal bulbs, turn on the ignition and turn on the turn signals. If the bulbs do not light up, they are burned out and need to be replaced.
4. Check the turn signal wiring. The turn signal wiring is located under the vehicle. If it is damaged or corroded, it may not be able to carry power to the turn signals. To test the turn signal wiring, use a multimeter to check for continuity between the turn signal switch and the turn signal bulbs. If there is no continuity, the turn signal wiring may be damaged and needs to be repaired.
Once you have identified the problem, you can replace the faulty part and fix the turn signal.
