Speedometer Repair

Online Auto Repair Manuals - Speedometer Repair

ALLData: Do It Yourself Auto Repair Manuals

Information

How does a speedometer work?

A speedometer measures the speed of a vehicle in miles or in kilometers per hour, as instrument panels of most vehicles show both velocities. Although still used today, many eddy current types of speedometers have been replaced with electronic ones. On both types the speed indication is scaled to the rotation of the transmission. It is an indirect speed measurement and may need calibration from time to time.

When does my speedometer need to be repaired?

One of the most common problems with a speedometer occurs when it isn’t calibrated to an acceptable degree of accuracy. Other problems could include a faulty speed sensor, damaged cable, or an instrument malfunction.

What are my options?

The vehicle can be taken to a local automotive repair shop. A skilled owner may be able to diagnose the problem and/or recalibrate the speedometer, but other problems may call for special diagnostic equipment. Numerous automotive repair websites advertise repair services and others sell parts online. DIY instructions or service manuals can also be purchased online.