What Causes a Car to Not Start but the Horn Still Works?

1 Answers
LaMatteo
07/30/25 6:00am
If the car horn sounds, it indicates that the battery still has some remaining power, but the inability to start the car may be due to insufficient battery power to support the vehicle's startup. This phenomenon can occur when the car battery's capacity is insufficient or when the battery is in a depleted state. Here is a detailed explanation of why the car may not start: 1. The vehicle's horn is directly powered by the battery and does not require the car to be started; it can be sounded when the car is parked and turned off. There is no significant relationship between the inability to start the car and whether the horn sounds. 2. There are many possible reasons why a car may not start, such as loose power cables to the starter, a faulty starter itself, ignition system issues, or problems with the fuel pump, etc. A specific inspection and repair are needed.
Was this review help?
16
3
Share
More Forum Discussions

What does a red battery indicator on the dashboard mean?

A red battery indicator on the dashboard means that the engine is not generating electricity. The solutions are: 1. Check if the battery connection wires are oxidized. If there is oxidation, clean and polish them first, then reinstall and test the vehicle, as sometimes oxidation hinders battery charging; 2. Check for any signs of loosening in the battery's positive and negative wires. The reasons for a red battery indicator on the dashboard are: 1. The generator belt is loose or slipping; 2. The generator output is too low; 3. The battery is damaged; 4. The generator rectifier bridge is damaged, causing uncontrolled generator output voltage; 5. The generator belt is broken, the generator is damaged, or the positive or negative wires are broken; 6. Cross-circuiting of electrical devices can also cause the indicator light to illuminate, but the brightness is not very strong.
6
3
Share

What kind of engine oil should be used for Cadillac XT4?

Cadillac XT4 should use fully synthetic engine oil. The method for changing the engine oil is as follows: 1. Lift the vehicle, remove the underbody shield, and place a container with a capacity of about 10 liters under the oil drain plug; 2. Unscrew the oil drain plug, use an air gun to blow for two minutes at the oil filler port, then tighten the oil drain plug after draining and wipe it with a paper towel to check for oil leaks; 3. Reinstall the underbody shield and lower the vehicle, then use a funnel to add engine oil through the oil filler port. Taking the 2021 Cadillac XT4 as an example, its body structure is a 5-door, 5-seat SUV with dimensions of length 4600mm, width 1881mm, height 1627mm, a wheelbase of 2779mm, a fuel tank capacity of 60 liters, a luggage compartment capacity ranging from 447 to 1334 liters, and a curb weight of 1652kg.
4
2
Share

What brand are the original tires on the Changan CS55?

Changan CS55 is equipped with Continental tires. Continental Tires is the world's third-largest tire manufacturer and Europe's largest automotive parts supplier. Renowned for their all-weather safety and reliability, these tires feature low noise levels and strong self-cleaning properties. They offer exceptional instantaneous overload capacity, responsive handling and cornering stability, outstanding braking performance on both dry and wet surfaces, and superior water drainage protection. They are the only road tires globally certified for driving at speeds up to 360 km/h, earning them a place in the Guinness World Records. Additional Information: The main functions of tires include: 1. Supporting the entire weight of the vehicle and bearing the car's load; 2. Transmitting traction and braking torque to ensure adhesion between the wheels and the road surface; 3. Reducing and absorbing vibrations and impacts during driving, preventing severe vibrations and premature damage to automotive components, adapting to the vehicle's high-speed performance while reducing driving noise, and ensuring driving safety, handling stability, comfort, and fuel efficiency.
4
1
Share

What is the normal tire pressure range for SUVs?

The normal tire pressure for SUVs is generally maintained between 2.2-2.5 bar. Due to seasonal factors, the tire pressure can be appropriately increased by 0.2 bar in winter and reduced by 0.1 bar in summer. This data is based on the international GBT2978-2008 standard requirements. Strictly speaking, tire pressure refers to the air pressure inside the tire. Tire pressure is the blood pressure of a car, and its level plays a crucial role in the car's performance and power. Tire pressure is an important factor affecting the service life and economy of tires. If you want to know the normal tire pressure value for your car, you can check the vehicle's user manual or the label next to the door B-pillar, as well as the tire pressure value marked on the inside of the fuel tank cap. Generally speaking, a tire pressure exceeding 2.8 bar is considered too high, and a tire pressure below 2.0 bar is considered too low. Hazards of excessive tire pressure: The friction and adhesion of the tire will decrease, affecting braking performance; it can cause steering wheel vibration and deviation, reducing driving comfort; it accelerates localized wear of the tread pattern in the center of the tire, shortening the tire's lifespan; it increases body vibration, indirectly affecting the lifespan of other components; it causes excessive stretching deformation of the tire cords, reducing the elasticity of the tire body, and increasing the load on the car during driving. Hazards of insufficient tire pressure: The friction coefficient with the road surface increases, leading to higher fuel consumption; it makes the steering wheel heavy and prone to deviation, creating unsafe driving conditions; it increases the movement of various parts of the tire, causing abnormal heat due to excessive rolling; it reduces the function of the cords and rubber, leading to delamination or cord breakage and excessive friction with the rim, causing damage to the bead area and abnormal wear; the friction between the tire and the ground increases exponentially, causing a sharp rise in tire temperature, softening the tire, and drastically reducing its strength. High-speed driving under these conditions may lead to a tire blowout. If the tire pressure monitoring indicator light comes on (a yellow symbol with an irregular circle, no stamp on top, four small spikes at the bottom, and an exclamation mark inside), there are generally three possible reasons: Abnormal tire pressure: Usually, it will alert if the pressure is below 1.8 bar or above 3.0 bar. In this case, tire inspection and pressure adjustment are needed. Tire pressure monitoring not reset: After inflating the tires, if the tire pressure is not reset in time, the tire pressure monitoring system will still record the previous data, causing the tire pressure monitoring indicator to light up. Simply reset the tire pressure to resolve this issue. Damaged tire pressure sensor: The tire pressure sensor, which is used to monitor tire pressure, is directly installed inside the tire and connected to the tire inflation port. If the sensor is damaged due to impact while driving, it can also cause the tire pressure warning light to come on. For sensor damage issues, the only solution is to replace it with a new component.
3
3
Share

How to Insert a USB Drive to Play Music in Cadillac XT6?

First, locate the USB port, take out the USB drive, and insert it into the USB port. Then press the operation button to switch to AUX, and continue pressing the AUX button until songs start playing.
12
1
Share

How to use the DS gear in Teana?

DS gear or S gear is the sport mode of the car. In sport mode, the engine can be kept at high RPM for a longer time. To use the DS gear in Nissan Teana, simply push the gear lever into the "DS" position when needed.
20
4
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.