If your brake lights stay on constantly—even when the car is off—you’re not just dealing with an annoyance. It can drain your battery, confuse drivers behind you, and signal an electrical or brake switch problem that keeps coming back. If a dealer can’t fix the issue under warranty after reasonable attempts, California’s Lemon Law may offer remedies. The information below explains the basics and how ZapLemon can help you understand your options.
Brake Lights Won’t Turn Off? California Lemon Basics
A brake light that won’t turn off is often tied to a faulty brake light switch, a misadjusted pedal sensor, shorted wiring (including trailer harness issues), or a problem with the body control module. Beyond the inconvenience, the safety implications are real: following drivers may not know when you’re actually braking, and a constant light can mask sudden stops. Persistent illumination can also drain the battery overnight, leading to jump starts, tow bills, and repeated trips to the shop.
California’s Lemon Law—part of the Song-Beverly Consumer Warranty Act—generally applies when a manufacturer or its authorized dealer can’t repair a warranted defect that substantially impairs the vehicle’s use, value, or safety after a reasonable number of attempts. The law can cover new and certain used vehicles sold or leased with the manufacturer’s warranty. There’s also a legal “presumption” during the first 18 months or 18,000 miles that may help if, for example, there are multiple repair attempts for the same issue or the car is out of service for an extended period, but you don’t have to meet the presumption to have a viable claim.
How does a stuck-on brake light fit? If the condition makes the vehicle unsafe or significantly affects its use or value—and the dealer can’t fix it under warranty after reasonable attempts—it may qualify. Real-world examples include multiple replacements of the brake switch with no lasting fix, recurring battery drains linked to the lighting circuit, repeated “no problem found” notes despite photos or videos, or long stretches in the shop while technicians chase electrical faults. Every situation is different, and whether your facts meet the law’s standards depends on the details and documentation.
What to Document and When to Contact ZapLemon
Good records make a strong foundation. Save all repair orders showing dates, mileage, work performed, parts replaced (such as brake switches or control modules), and the dealer’s notes. Track any days your vehicle is out of service, including time waiting for parts or diagnostic steps, and keep copies of tow receipts, rental or loaner agreements, and jump-start invoices if applicable. Photos or short videos showing the brake lights stuck on—especially with the ignition off—can be powerful proof.
A simple incident log also helps: note when the lights stayed on, how long the car sat, warning messages on the dash, and whether the battery died. Ask the service department to write your concern exactly as you describe it and to include their findings, even if they say “cannot duplicate.” Check for recalls or Technical Service Bulletins (TSBs) tied to your make and model; if one exists, mention it. Avoid DIY wiring fixes while under warranty, as modifications can complicate repairs and records.
Consider contacting ZapLemon if you’ve had two or more unsuccessful repair attempts, your car has been in the shop around 30 cumulative days for the issue, the dealer says the condition is “normal” despite evidence, or the problem returns shortly after each visit. Early conversations can help you understand your rights and avoid common pitfalls in documentation and communication. A consultation is necessary for legal advice—ZapLemon can review your records, explain how California’s Lemon Law may apply to your situation, and discuss next steps tailored to your facts.
This article is for informational purposes only, is not legal advice, and reading it does not create an attorney-client relationship. Attorney Advertising. Results depend on the specific facts of each case. If you believe your vehicle may qualify as a lemon due to brake lights staying on constantly, contact ZapLemon for a consultation at (310) 489-3017 or visit https://zaplemon.com.