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what would cause the speedometer to stop working
The vehicle condition may be caused by the failure of speedometer itself, instrument, body computer, speed sensor, etc., And it is likely to be caused by vehicle speed sensor, sensor failure or poor contact.Moreover, the failure of the speed sensor will also affect the normal counting of the odometer. It is recommended to check it in time. Usually, the speed sensor is located on the output shaft (second shaft) of the transmission. On the transmission housing, the position is relatively hidden. Some cars can be seen from the engine compartment, and some cars need to be lifted up to see. 1. The speedometer is out of order. The reasons are as follows: the flexible shaft is damaged, the driving pinion is damaged, the watch is damaged or the connecting nut of the flexible shaft is not tightened. Replace the flexible shaft, the driving pinion, the watch or the connecting nut of the flexible shaft. 2. The speedometer pointer is unstable. The reasons are as follows: the flexible shaft is defective, the watch is damaged or the locking nut of the flexible shaft is poorly installed. The installation method of the flexible shaft, watch or the nut of the flexible shaft should be replaced.
How:
1. The fuse is blown. First of all, check whether the fuse is burnt out. If it is burnt out, replace it with a new fuse, which is placed in the fuse box. Check the number according to the instructions.
2. Check the wiring. The display of the instrument panel is connected to the power supply. Check whether there is a problem with the line, especially for some modified vehicles. If the line is not connected properly, it will become loose.
3. Battery problem. Press the horn for several times, or flash the light continuously, and observe whether the power is normal.
The speedometer does not work: first, operate according to the above fault judgment method, dial the sensor connector to draw the artery impulse signal line, and the speedometer pointer does not rotate at this time. Then remove the instrument panel, measure the circuit, and no problem is found. Then check the instrument panel carefully to see if there is any abnormality. It is found that the grounding electrode of the speedometer is open welded. After being welded firmly again, the speedometer works normally.
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