Why are the taillights of BYD S6 always on?

2 Answers
Cynthia
07/29/25 2:42am
BYD S6 brake lights staying on is mainly caused by a faulty brake light switch. It is recommended to visit a 4S shop for inspection and repair as soon as possible to ensure driving safety. Below are the detailed descriptions: 1. Exterior: The overall style of the vehicle is stable and generous, with fashionable and smooth lines that are sharp yet elegant, perfectly balancing aerodynamics. The eagle-eye headlights are bright and expressive, complemented by a chrome grille with undulating waves. The headlights feature a sporty black base design and a trendy eyebrow light design, with the high beams separated from the low beams equipped with lenses. The rectangular black fog light frames contain only two small circular light units. 2. Interior: The BYD S6 adopts a dynamic two-tone interior with upper and lower layers in light and dark shades. The overall design is simple and elegant, with meticulous attention to detail in both design and craftsmanship, and cleverly placed storage compartments of various sizes. Additionally, the S6 boasts numerous luxurious and personalized features, including a keyless system, 11-speaker setup, a premium DVD player, a 7-inch touchscreen display, mobile digital TV, and an 8-way adjustable driver's seat.
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SanTyler
08/12/25 6:38am
I've been running an auto repair shop for ten years and have encountered many cases of the BYD S6's taillights staying on. The most common cause is the light switch getting stuck in the 'on' position, especially after several years of use when the internal contacts tend to stick or wear out. Another frequent issue is a wiring short circuit—the trunk wiring harness may get damaged from repeated opening and closing, causing the wires to touch the car's metal body and create a ground short. There's also the possibility of a relay failure, where the contacts in that little black box get burnt and can't cut off the current; or the body control module sending an incorrect signal that keeps the lights on. Checking is simple: first, turn off all light switches, including the auto mode; if the lights are still on, inspect the fuse box to see if the taillight fuse is blown; if that doesn't work, disconnect the battery's negative terminal temporarily to avoid draining the battery. Remember to check these components during regular maintenance to prevent small issues from becoming major hazards—safe driving is the top priority. When repairing, spending a few dozen dollars to replace the switch or fix the wiring usually solves the problem.
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