California Lemon Law for Turn Signal Malfunctions

When your turn signals stop working, it isn’t just inconvenient—it’s a real safety risk that can invite tickets, near-misses, and stress every time you drive. If the problem keeps coming back and the dealership can’t fix it under warranty, California’s Lemon Law may offer remedies. Below, ZapLemon explains the basics in plain language and shares practical steps you can take to protect your rights.

Turn Signal Failures and California Lemon Law 101

Turn signal problems come in many forms: the blinkers don’t light up, they blink too fast (hyperflash), the dash indicator works but the exterior lights don’t, the hazard lights work while the turn signals won’t, bulbs or LEDs fail repeatedly, or signals cut out intermittently. Because turn signals are a core safety feature, these issues can “substantially impair the use, value, or safety” of a vehicle—an important concept under California’s Lemon Law. If the defect keeps returning despite repair attempts, it may meet the threshold for legal remedies.

California’s Lemon Law (part of the Song-Beverly Consumer Warranty Act) generally applies to new and, in many cases, used or certified pre-owned vehicles sold or leased in California with a manufacturer’s warranty. If a covered vehicle has a defect that persists after a reasonable number of warranty repair attempts, the manufacturer may be required to repurchase or replace it. California also has a “presumption” period—often described as within the first 18 months or 18,000 miles—where certain guidelines can make it easier to show a lemon, such as two or more repair attempts for a serious safety issue, four or more attempts for other defects, or 30+ cumulative days out of service. The exact standards and timelines can be nuanced and fact-specific.

Turn signal defects often stem from issues like a faulty multifunction (stalk) switch, a bad flasher or body control module (BCM), wiring harness faults, moisture or corrosion in lamp assemblies, software glitches, or even LED board failures. Recalls or technical service bulletins (TSBs) may exist for some models and can be relevant to your situation. Even if your vehicle is older, if it’s still under the original or extended manufacturer’s warranty, repeated, unfixable turn signal problems may still be considered under the Lemon Law framework—depending on the facts and documentation.

Steps to Protect Your Rights if Turn Signals Fail

Document everything. Each time the turn signals act up, note the date, mileage, conditions (rain, nighttime, highway speeds), and what exactly happened (e.g., “left signal hyperflashed; exterior lamp off; dash flashed rapidly”). Take photos or short videos showing the issue. When you visit the dealer, make sure the repair order clearly states your complaint in your own words, and ask for a copy that shows the “cause” and “correction” the service department recorded.

Give the authorized dealer a reasonable opportunity to diagnose and repair the problem under warranty. Leave the car long enough for testing if the issue is intermittent, and ask if there are TSBs or software updates. Check for open recalls, verify your warranty coverage, and avoid aftermarket electrical modifications while you’re troubleshooting, as they can complicate warranty claims. If the issue keeps returning, escalate to the manufacturer’s customer care line, get a case number in writing, and track all communications.

If multiple repair attempts or significant days out of service are piling up, it may be time to learn about your Lemon Law options. A consultation can help you understand whether your facts align with California’s standards, what documentation is most important, and what next steps might look like. ZapLemon assists California consumers with turn signal malfunctions and other safety-related defects—offering guidance on records, timelines, and potential paths forward—so you can make informed decisions. This information is general and not legal advice; a personalized evaluation is essential.