If your hazard lights don’t work, you’re not just dealing with a nuisance—you’re facing a safety risk that can leave you exposed on the side of the road or in heavy traffic. At ZapLemon, we regularly hear from California drivers whose emergency flashers fail intermittently or completely, even after multiple trips to the dealership. This article explains how California’s lemon law may apply to hazard-light defects and what simple steps you can take to protect your rights. This information is educational in nature, not legal advice, and reading it does not create an attorney-client relationship.
Hazard Lights Not Working? CA Lemon Law Basics
Hazard lights (also called emergency flashers) are essential safety equipment. When they fail, other drivers may not see your stopped or slow-moving vehicle, increasing the risk of collision. Common causes include a faulty hazard switch, a bad flasher relay, wiring or ground faults, a failing body control module, software glitches, or moisture intrusion in the lamp assemblies. Even if the lights sometimes work, intermittent failure can still present a serious safety concern.
California’s lemon law—the Song-Beverly Consumer Warranty Act—generally protects consumers when a manufacturer or its authorized dealer cannot repair a vehicle’s warranty-covered defect after a reasonable number of attempts. The defect must substantially impair the vehicle’s use, value, or safety. Hazard-light failures often fall under “safety,” especially when the issue persists despite repeated repairs or the vehicle spends significant time in the shop.
Coverage can apply to new vehicles and, in many cases, used or certified pre-owned vehicles that are still under the manufacturer’s warranty. Light trucks, SUVs, and certain small business vehicles may also qualify. While every situation is fact-specific, patterns that may raise lemon law questions include repeat “no problem found” results, short-lived fixes, or cumulative days out of service approaching a month or more. Maintaining clear records is critical to assessing your options.
How California Lemon Law Applies to Hazard Lights
A hazard-light defect can qualify as a “nonconformity” if it’s covered by the warranty and the dealer can’t fix it within a reasonable number of tries. What counts as “reasonable” varies with the seriousness of the problem. Because hazard lights are safety equipment, fewer repair attempts may be considered reasonable than for a purely cosmetic issue. Intermittent failures—such as flashers working only after hitting a bump or failing in rainy conditions—still matter, so document when, where, and how the problem occurs.
Examples that often prompt consumers to explore lemon law options include: multiple visits where the dealer replaces a switch or relay but the problem returns; warning lights or error codes tied to the body control module that persist after updates; or repeated “could not duplicate” notes even when you can produce video evidence showing the hazard lights not illuminating. If the vehicle is in the shop for long stretches waiting for parts, that downtime counts, too. Each repair order, loaner receipt, and timeline detail helps create a clear picture of the defect and the manufacturer’s repair opportunities.
Practical steps you can take include: photographing the dash and exterior lamps when the hazard switch is engaged but lights do not flash; recording the date, mileage, and weather conditions each time it happens; and requesting complete, legible repair orders that describe your complaint and the technician’s findings. Check your warranty booklet, search your VIN at NHTSA’s website for recalls, and ask the service advisor about Technical Service Bulletins. Before making any decisions, consider a consultation to understand how the facts of your case may fit California law. This article is for informational purposes only and does not constitute legal advice.
ZapLemon helps California drivers understand their rights when persistent defects—like hazard lights not working—impact a vehicle’s safety, use, or value. We don’t make guarantees, and your outcome will depend on your specific facts, documentation, and warranty history. This post is attorney advertising, is not legal advice, and reading it does not create an attorney-client relationship.
If you believe your vehicle may qualify as a lemon, contact ZapLemon at (310) 489-3017 or https://zaplemon.com.