What is the reason for the BYD S7's turn signal not lighting up and the horn not working?
3 Answers
BYD S7's turn signal not lighting up and the horn not working may be due to an ESP system malfunction. 1. Introduction to ESP: ESP consists of three main components: sensors, actuators, and an electronic control unit (ECU). Sensors typically include wheel speed sensors, steering wheel angle sensors, lateral acceleration sensors, yaw rate sensors, and brake master cylinder pressure sensors. Actuators generally include traditional braking systems and hydraulic regulators. 2. Solution: The ESP system involves many sensors, so the usual cause of failure lies with the sensors. This could be due to loose wiring connections causing sensor failure or false alarms. If the ESP light comes on while driving, it is necessary to reduce speed, avoid excessive steering, and promptly find a nearby repair shop for inspection.
I've been driving for over ten years, and when both the turn signals and horn of my BYD S7 stopped working simultaneously, it was most likely a blown fuse. Turn signals and horns often share the same fuse, which can be found in the fuse box, usually located on the left side of the engine compartment or under the driver's seat. When checking, turn off the key, open the fuse box cover to see if there are any blackened or broken fuses, and try replacing it with a new one. If replacing it doesn't fix the issue, it might be a relay problem or a short circuit in the wiring, especially poor contact in the wiring can cause a chain reaction of faults. Last time I fixed my car, I found that switch wear can also affect signal transmission. Not addressing this issue promptly is very dangerous, as others may not see your signals when turning and could collide. I recommend checking the fuse yourself first; if that doesn't work, take it to a professional shop to test the voltage and circuit integrity. Always pay attention to waterproofing and moisture prevention, and avoid using car electronics immediately after rain.
While studying automotive electrical circuits, I noticed that the turn signals and horn on the BYD S7 are not working. The first thing to consider is a blown fuse, as these two components often share a large fuse that can burn out due to current overload. First, locate the fuse box, which is usually found in the front compartment or under the steering wheel. Open the cover and quickly check using a test light or multimeter. If you don't have tools, a visual inspection for any broken fuses will suffice. Another common factor is a faulty combination switch or relay failure. The relay is located in a small black box next to the fuse box, and poor contact at the terminals can cause complete failure. From my previous inspections, voltage instability can also accelerate component aging. I recommend a step-by-step troubleshooting approach: first replace the fuse, then test the relay. Don’t overlook issues with aging wiring—loose connections in older vehicles are common. During maintenance, regularly clean dust from the fuse box to prevent short circuits.
