A speedometer is an important device on the panel of any modern car. However, there are situations where a speedometer is out of order and begins to "lie" in his testimony. The wreckage of the speedometer may be manifested in different things: The needle of the speedometer shows 0 during the movement, the needle of the speedometer is "stuck" and remains in one position, the reading of the speedometer is "downloaded", regardless of the actual speed of the car.
- The needle of the speedometer shows 0 during motion,
- the needle of the speedometer is "stuck" and remains in one position,
- the speed of the speedometer is "downloaded", regardless of the actual speed of the vehicle.
Depending on which speedometer is equipped with your motor vehicle-mechanical or electronic-the causes of its failure (and thus the repair methods) may be different.
In the case of a mechanical speedometer, the most frequent cause of the speed of the speedometer is the cable damage or disconnection. The speedometer's spike could have disconnected if the rack-mount cage was spinning or loosed. In any case, the test must begin with a speedometer cable. If the cable itself shows signs of wear (rubbing, damage, etc.), I must change the speedometer. Before the installation of the new cable, experienced motorists are advised to lubricate the lubricant which will protect the cable from the premature failure. Note that the new speedometer cable should have exactly the same length as the one you replaced.
In addition, mechanical speedometers often encounter damage to the mechanical part of the device itself. To diagnose the speedometer mechanism, you need to understand the dashboard, and then scroll the speedometer cable by carefully observing the meter reading. If the needle of the speedometer is still motionless or moves chaotic, then the speedometer mechanism is out of order and needs to be replaced.
With regard to electronic speedometers, the reason for their failure is to look primarily in electronics. If the electronic speedometer is out of order, the test should start with the speed sensor, as it is exactly the speedometer that gets the information. In addition, the integrity and integrity of the sensor's contacts should be checked-if there are traces of corrosion or oxidation, the contacts need to be cleaned.
