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what does it mean when your speedometer stops working
Speedometers and odometers are generally mechanical and electronic. Speedometer Troubleshooting 1. The speedometer is not working. The reasons are as follows: the flexible shaft is broken, the driving pinion is damaged, the watch is damaged, or the connecting nut of the flexible shaft is not fastened. The connecting nut of the flexible shaft, driving pinion, watch or flexible shaft should be replaced.
2.The pointer of the speed odometer is unstable. The reasons are as follows: the flexible shaft is not good, the watch is damaged or the flexible shaft lock nut is not installed well, the flexible shaft and watch should be replaced or the installation method of the flexible shaft nut should be changed. During the test, lift the car, start the engine, put the transmission in gear, turn the drive wheels, and observe the working condition of the tachometer. Note that the engine speed should not be too high during the test, so as not to damage the differential. Troubleshooting and troubleshooting of mechanical speedometers The common faults of mechanical speedometers are noise, needle shaking or not working. Noise malfunction.
Generally, the flexible shaft (odometer line) lacks oil and needs to be removed for cleaning and lubrication. But it is better to replace the flexible shaft. In special cases, if the shaft in the meter head is worn, causing the aluminum cup to collide with the magnet and make noise, the meter head needs to be replaced. Speedometer not working, reading inaccurate or vibrating malfunction. First check whether the flexible shaft and other wiring harnesses are misaligned and squeezed. If so, place the flexible shaft correctly; check the wear of the transmission output shaft driving pinion, and the meshing gap between the flexible shaft and the driving pinion. If not, replace; check clearance between header worm gear and worm. If it is too large, it can be adjusted. Electronic Speedometer Troubleshooting and Troubleshooting The common problem with electronic speedometers is that they don't work. The cause is a bad sensor or faulty wiring harness and gauges. (1) Determine whether the sensor or instrument is faulty. Open the connector of the transmitter, turn on the ignition switch, and connect the No. 2 electrode in the connector to the red road line with a brown background, use a self-made wire with a plug to make a dash on the grounding part of the body, and input a pulse signal to the instrument. At this time, if the pointer of the speedometer rotates, it means that the instrument is normal, and the fault occurs on the reed switch tube or magnetic ring of the sensor. At this time, if the pointer of the speedometer does not rotate, it means that the meter or the connection line is faulty, and you can continue to the next step of fault identification.
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