What is the reason for the continuous sounding of the Besturn X80 horn?
3 Answers
The reasons for the continuous sounding of the Besturn X80 horn are as follows: 1. The touch chip inside is loose or detached, touching the switch: Generally, when pressing the horn, do not press too hard, as excessive force can easily cause the touch chip to loosen or detach. 2. The power line of the horn is continuously energized: The reason for the continuous energization of the horn power line may be that the horn relay contacts cannot open normally. Below is relevant knowledge about car horns: 1. Composition: The car electric horn consists of an iron core, magnetic coil, contacts, armature, diaphragm, etc. 2. Principle: When the horn switch is pressed, current flows through the contacts to the coil, generating magnetic force that pulls down the armature, forcing the diaphragm to move. The movement of the armature causes the contacts to open, interrupting the current and causing the coil's magnetic force to disappear. The diaphragm, under its own elasticity and the spring plate, returns to its original position along with the armature, closing the contacts and reconnecting the circuit. Current flows through the contacts to the coil again, generating magnetic force and repeating the above actions. This cycle repeats continuously, causing the diaphragm to vibrate and produce sound.
I've also experienced the horn of the Besturn X80 going off continuously. That time on the highway, the horn suddenly started blaring non-stop, which scared me into pulling over immediately. After opening the engine compartment to check, I found that the plug of the horn button had been worn short-circuited by the clock spring (spiral cable) inside the steering wheel. This thing is basically just a connector, and it's prone to wear and tear over time. Another common cause is the relay contacts getting welded together due to overheating—you can find the relay in the fuse box, and if it feels hot to the touch, that's likely the culprit. If the issue occurs on rainy days, it might be due to water causing a short circuit at the wiring connectors. If you can't find the cause, disconnecting the battery cable can serve as an emergency measure, as continuous power flow can severely damage the battery. In the end, I had to go to the 4S店 to replace the entire clock spring assembly to completely resolve the issue.
The persistent honking of the Besturn X80's horn is mostly due to wiring issues. The clock spring inside the steering wheel for the airbag is particularly prone to failure. I've disassembled several faulty vehicles and found the copper foil inside worn out, causing the horn button to stay engaged. Another common cause is the relay being burnt and stuck together—it's a small black box in the engine compartment's fuse box that makes a clicking sound. Another possibility is the horn button's spring plate getting stuck, which can usually be fixed by spraying some electronic cleaner into the button's crevice. If you're handling it yourself, first disconnect the negative terminal of the battery, then check the connector under the steering wheel for any signs of water damage. However, be aware that after disconnecting the battery, the window anti-pinch function will be disabled and will require a reset to reactivate. Taking it to a repair shop might save you some hassle.
