Did you know that you can get a ticket for a malfunctioning speedometer? Not only would you be risking a speeding ticket with an inaccurate speed reading, but you can get charged for both offenses -- harsh! A speedometer on all vehicles is an important safety feature susceptible to breaking or falling out of calibration. Most speedometer problems lie within the speedometer cable or housing.
The majority of speedometers in our vehicles today are electric. The speedometer cable is fastened to a gear inside the transmission or driveshaft. This cable tracks the rotation through electrical vibrations then translates the duration of the electrical signal into the speed when you are driving. A secondary speedometer cable is connected to a wheel sensor and measures the distance at which your vehicle travels. The speedometer cable sends all this data to the instrument panel and then delivers the information to the speedometer.
On the other hand, the cable housing is a protective cover surrounding the cable to prevent it from being damaged. These two components work simultaneously to power the speedometer and give drivers precise reading. Over time, the components can fail due to damage or typical wear and tear. Here are several warning symptoms that may indicate a failing speedometer cable or housing:
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