What should I do if the water temperature rises when the headlights of the car are turned on at nigh

The main reasons are:

The headlights have separate ground wires (tie wires) and power supply wires from the generator, while water temperature gauges and other meters are powered by the positive pole of the battery. Due to the poor contact of the negative electrode of the battery, the power supply of the meter is in a low state.

Because there is no problem with the ground wire of the generator regulator and the headlight, the output reference voltage of the voltage regulator in the generator is consistent with the headlight end, and the battery ground wire (lap wire) will produce a voltage drop between the ground wire of the generator regulator due to poor contact, when the headlight is turned on, the generator load increases, the output voltage drops, and the voltage regulator increases the output to the normal voltage, at this time, the voltage of the headlamp is normal, because the generator has adjusted the output voltage up, so the voltage of the battery end is also increased correspondingly, and the power supply voltage of the water temperature meter is increased, showing that the water temperature has risen.

In general, the reason is that because the reference potential of the instrument and the headlight is different, the reference potential of the regulator changes when the headlight is switched on and off, so that the final voltage output of the regulator has different voltages on two loads of unequal potential. The solution is to re-polish the negative pole of the battery with the iron wire and re-tighten it.

The resistance of the tie wire is large, polish it or install a few tie wires, the voltage is stable, and the foundation is stable, and the car is good.

If you turn on the air conditioner at this time, and turn on the front and rear fog lights, you may be calling the police.

Just put on the wire.

This is because the headlights have separate ground wires (tie wires) and power supply wires from the generator, while water temperature gauges and other instruments are powered by the positive pole of the battery. Due to the poor contact of the negative electrode of the battery, the power supply of the meter is in a low state.

Because there is no problem with the ground wire of the generator regulator and the headlight, the output reference voltage of the voltage regulator in the generator is the same as that of the headlight end.

Scientific principle: 1. The water temperature is 60 degrees from C - H C As long as the water temperature gauge pointer reaches C, the water temperature has reached 60 degrees. The temperature indicated by the hred grid is 110 degrees, and from a span of 60-110 degrees, you can estimate the temperature indicated by the water temperature meter.

2. The sensor of the water temperature gauge is fixed on the engine cooling channel with threads. The thermistor determines the amount of current flowing through the windings of the water thermometer's coils. This drives the head of the gauge to oscillate.

In the past, the cooling water of automobile engines was used as tap water, and now many automobile engine cooling systems use special coolants. Hence also known as a coolant temperature gauge.

Check 1, the tie wire of the headlight, 2 the lap wire of the cab and the big shelf, 3 check the tie wire of the engine and the big shelf, 4 check the tie wire of the instrument, 5 check the total power cord.

Summary. Dear, hello, the water temperature meter rises when the headlights are turned on, and it is normal after it is turned off, which is obviously related to the virtual connection of the line. 1. In this case, first check the vehicle-related tie line, which is generally the lap line of the instrument wiring harness, and the lap wire of the Xu family or engine position is virtually connected.

2. This fault does not belong to the real high water temperature, this belongs to the inflated high water temperature. In this case, you should also check the battery, if the battery aging attenuation is serious, it will also lead to linkage failure, and the battery needs to be replaced. Under normal circumstances, the service life of the battery is about 3 to 4 years, and if it exceeds this service life, it is recommended to replace it.

3. This phenomenon caused by the unstable power generation of the generator related to the vehicle needs to check the power generation of the generator, especially when the headlights are turned on, if the power generation is low, the generator needs to be replaced. Dear, I wish you a happy life, if you have other questions, you can continue to consult, I will answer for you as soon as possible.

When the headlights are turned on, the water temperature gauge rises, and when it is turned off, it is normal, what is going on and how to repair it?

Dear, hello, the water temperature meter rises when the headlights are turned on, and it is normal after it is turned off, which is obviously related to the virtual connection of the line. 1. In this case, first check the vehicle-related tie line, which is generally the lap line of the instrument wiring harness, and the lap wire of the Xu family or engine position is virtually connected. 2. This fault does not belong to the real high water temperature, this belongs to the inflated high water temperature.

In this case, you should also check the battery, if the battery aging attenuation is serious, it will also lead to linkage failure, and the battery needs to be replaced. Under normal circumstances, the service life of the battery is about 3 to 4 years, and if it exceeds this service life, it is recommended to replace it. 3. This phenomenon caused by the unstable power generation of the generator related to the vehicle needs to check the power generation of the generator, especially when the headlights are turned on, if the power generation is low, the generator needs to be replaced.

Dear, I wish you a happy life and feast, if you have any other questions, you can continue to consult, I will answer for you as soon as possible.

Dear, hello, the water temperature meter rises when the headlights are turned on, and it is normal after it is turned off, which is obviously related to the virtual connection of the line. 1. In this case, first check the vehicle-related tie line, which is generally the lap line of the instrument wiring harness, and the lap wire of the Xu family or engine position is virtually connected. 2. This fault does not belong to the real high water temperature, this belongs to the inflated high water temperature.

In this case, you should also check the battery, if the battery aging attenuation is serious, it will also lead to linkage failure, and the battery needs to be replaced. Under normal circumstances, the service life of the battery is about 3 to 4 years, and if it exceeds this service life, it is recommended to replace it. 3. This phenomenon caused by the unstable power generation of the generator related to the vehicle needs to check the power generation of the generator, especially when the headlights are turned on, if the power generation is low, the generator needs to be replaced.

Dear, I wish you a happy life and feast, if you have any other questions, you can continue to consult, I will answer for you as soon as possible.

You can try to check as long as it's a problem with the circuit

1. The iron wire of the headlights.

2. The iron line between the cab and the large shelf.

3. The hitching line between the engine and the large shelf.

4. The lap wire of the instrument, see if these tie wires are connected.

5. Check the iron tie and integrated circuit of the instrument panel.

6. Check whether the voltage regulator of the dashboard is working well.

7. Check whether the instrument headlight high beam indicator and water temperature gauge share the same tie wire.

8. Use the replacement method to check the working condition of the water temperature gauge.

9. If the automotive electrical appliance is controlled by multi-channel local area network, then the multi-channel control module should be checked one by one. (Mainly there is a problem with the instrument control module).

It should be a phenomenon caused by poor iron and excessive resistance, only if it is not an occasional failure, it is easy to judge, and the same high water temperature depends on whether the water temperature is normal, if it is normal, it means that the cooling system has poor circulation or the conversion valve is not fully opened.

If the headlight water temperature gauge comes up as soon as you turn on it, you can first connect the negative pole of the battery to the body shell with a ground wire, if not, then you check whether the ground wire of the instrument is in poor contact, whether there is 12V when you turn on the headlight, if not, you can connect a tie wire to the instrument in a good place.

Regarding your question, when the water temperature is high, you should determine whether the actual water temperature is consistent with the indicator needle, if it is falsely high, the actual water temperature is not high, replacing the above accessories and installing iron wires will not solve the problem. It is necessary to deal with the relevant wiring harness, because the working principle of the water temperature indicator pin is changed by resistance, if the wiring harness of the live wire is falsely connected, it will also cause the resistance signal to be inaccurate, so the pointer will also be inaccurate. It is recommended that you go to a regular 4S store for on-site inspection according to the above analysis.

Hello, there are many reasons for this: 1. The water level is insufficient. The long water cycle will cause the water to be lost slowly, resulting in a lack of water in the tank, and we do not check and add water in time. This can easily cause the water tank to "boil".

2. The water tank is corroded. If there is dirt in the tank, such as mud, rainwater, etc., it is easy to rust the tank. 3. The water tank is leaking.

A leak in the water tank will block the water circulation and seriously cause the water tank to "boil". 4. The thermostat size cycle conversion is not working properly. 5. The speed of the cooling fan is abnormal, the cooling fan may be damaged or the wire is short-circuited, causing the fan to not work, or the cooling fan speed is very slow.

If my answer is helpful to you, please set it to.

How did you solve it in the end? Thank you.

Is the effect of adding a striking wire or not obvious?

The high water temperature of the car with the headlights on may be due to the following reasons:

1.Pump failure: A water pump is a device responsible for transporting water from the inside of the engine to the radiator, if the pump fails, it will cause the water to not flow properly, resulting in an increase in water temperature.

2.Faulty slider in the cooling bridge: If the radiator fails, it will lead to poor heat dissipation, which will increase the water temperature.

3.Engine Internal Failure: If there is a failure inside the engine, it can cause the fuel to burn abnormally, which can lead to an increase in water temperature.

4.Damaged lights: If the lights are damaged, it is possible that the sensitive wax will cause irradiation to the inside of the engine.