What to Do When Turn Signals and Hazard Lights Don't Work?

[DelArya]

If both the turn signals and hazard lights are not working, it is recommended to promptly check the vehicle's light switch and wiring harness for any short circuits. If necessary, visit a 4S shop for repairs as soon as possible. The solutions for non-functioning turn signals and hazard lights are as follows: 1. Check if the power line terminal of the flasher relay has electricity. If there is no power, inspect whether there is a break in the line to the power source. 2. If there is power, use a screwdriver to connect the two terminals of the flasher relay. If the turn signals light up, it indicates a fault in the flasher relay, which should be replaced. If they do not light up, inspect the flasher relay. Open the flasher relay cover and check if the coil and resistor are intact. If the resistor heats up and the contacts cannot close, press the movable contact; if the turn signals light up at this point, it indicates a fault in the relay. Adjust the contact gap if it is too large. If the turn signals still do not light up when pressing the movable contact to close the contacts, use a screwdriver to short-circuit the contacts. If the lights turn on, it indicates oxidation of the contacts. 3. If the turn signals do not light up when short-circuiting the two terminals of the flasher relay with a screwdriver, the issue may lie with the turn signal switch. During inspection, use a screwdriver to connect the power line of the turn signal switch to the left and right light line terminals separately. If the lights turn on, it indicates a fault in the turn signal switch, which should be removed for repair or replacement.

[LaCole]

When both the turn signals and hazard lights fail simultaneously, it's no simple matter. Last time I encountered this issue, I first checked the fuse box and found the 15A fuse corresponding to the flasher relay had blown. Replacing it with a spare fixed the problem. If you're unfamiliar with fuse locations, consult the manual or look up a diagram online for your specific model. If the fuses are fine, the issue might lie with the combination switch, which controls both turn signals and hazards. In an emergency, you can use hand signals to indicate turns, but avoid highways. I recommend keeping a portable fuse kit in your car—it costs just a few bucks and can solve 80% of sudden problems. If all else fails, seek professional repair, as turn signal functionality is critical for road safety—never push your luck.

[VonOlive]

When both turn signals and hazard lights fail simultaneously, follow these three steps: First, check the fuse. Locate the flasher relay fuse in the engine compartment fuse box and inspect for any breaks. Second, examine the relay. Remove it from the lower left side of the driver's seat and listen for a clicking sound—silence means replacement is needed. Third, test the bulbs. Although all bulbs failing is rare, don't overlook this possibility. I once fixed a total failure caused by poor wiring contact by sanding the connector. If inexperienced, avoid forcing repairs. At night, use the lock button to activate emergency lights as a temporary substitute for hazards; during the day, use hand signals for turns. Remember to have the technician inspect wiring harness wear during your next maintenance.

[DelBethany]

This issue commonly occurs due to a blown fuse or switch malfunction. First, open the engine compartment fuse box and locate the fuse labeled 'turn' or 'hazard'—the transparent casing allows you to see if the filament is broken. Replacing it with the same model should restore functionality. If that doesn’t work, there’s an 80% chance the steering column switch assembly is faulty, which requires removing the steering wheel for replacement. A relay failure can also cause similar symptoms; its location is above the brake pedal. If you can’t handle it yourself, head to a repair shop immediately. Remember to signal early when turning on the road, especially at intersections—don’t rush. I’ve seen people use magnetic emergency lights stuck to the roof as temporary hazard lights; they cost around ten bucks and can serve as a quick fix.