The horn doesn't ring when it's cold.

Dear riders, BYD F3 is cold. Every morning, the car horn doesn't sound, the car is hot, and it's okay. What happened? The horn was changed, but it still didn't solve the problem. There is a reserved line at the back of model 09 F3, and the 69 horn installed by myself has been ringing normally. Two days ago, when the car was driving normally, the generator broke down, so I continued to drive with the electricity in the battery. After a while, the 6*9 horn suddenly stopped ringing, but the front door horn sounded normally in front of me. In a rage, I changed the horn and then opened it for more than a month. It's normal! It is estimated that the snail horn is easy to get water when washing the car, which leads to short circuit! If you are a snail, you can consider looking for water or poor contact. The fuse is in the engine compartment fuse box. The rubber ring outside the horn diaphragm is hard frozen on the fuse box cover, so the vibration is blocked, so you can't make any noise. Return to normal after heating. You can consider changing the low-temperature speaker. Hello, there should be something wrong with the speaker or relay. I suggest checking it. I hope my answer is helpful to you. I am a new speaker. It doesn't ring when you enter the community at night, but it will be fine soon. I don't think it's the horn. Could it be that the all-in-one machine stopped outputting to the rear speaker in order to avoid power failure? Later, I searched the control panel of the all-in-one machine and couldn't find the output function of the rear speaker. It is not enough to disconnect the negative battery for a while, and then turn on and restart the all-in-one machine. Horn check is normal, and the two rear horns don't ring at the same time. It should not be a simple method of poor contact. It doesn't matter if the horn cathode is directly ironed to see if it rings with the relay and hairspring. This machine has no relay, so if the CD is broken, it won't start. The hairspring is only useful if it is controlled. Even if it is broken, the control function will fail. First look at whether the cd harness plug is oxidized. If it has been removed, it is best to pull out the female pin of the plug to deal with the shrapnel. If there is no problem, I suspect there is something wrong with the cd player. What should I do if the contact point of the horn button is bad? I think that's the reason. Hehe, it's basically a hairspring problem. Check for yourself what a hairspring is, but first check that the plug is correct. It's MINUS 5 or 6 degrees here, and the cold car horn is hoarse. Only when the car is hot will it make a normal sound. This is the wiring problem. Please check the safety and grounding wire. When the horn is turned off, whether there is a relay pull-in sound, and then determine whether it is in front of or behind the relay. Open the steering wheel buckle cover and polish the contact points with sandpaper. I really hope BYD can pay attention to these small problems objectively and pay attention to product quality! You can check the wiring, it should be the horn wiring problem, or which horn button on the steering wheel is in poor contact. So is mine. If the car doesn't drive for a few days, the horn will only ring, or it won't ring, and it will last for hours. Press the horn a little. It rang again, and it was not handled. I don't know if it's the horn or the wiring. This problem happened to me. 15 model is very comfortable. Mine is that the wire on the speaker is loose, so just plug it in again. However, this problem has happened several times. I'm going to honk the horn. There should be no problem with the hairspring and relay. The question is whether the hairspring and relay are ringing or not. You were silent for a while, and it was the same horn. So you can install a speaker product by elimination and see what happens. When it doesn't ring, you can unplug the speaker cable and see if there is a 12v power supply. If there is, you will know which one is broken. If the relay does not click, it means that the relay has not been changed, and there is no 12v. That's the balance spring problem @20 19.