What is the Speedometer Cable all about?
The speedometer cable, which is connected to the speedometer in the dash and runs through the gearbox, follows a curved route and should have few or no bends or kinks especially in the ends. The cable, powered by the drive shaft, turns a magnet that creates an eddy current. The circular current rotates the speed cup, which tightens the hairspring. As the hairspring tightens, a pointer on the dial turns and indicates the speed. A faulty or broken speedometer cable causes the vehicle’s speedometer to register the wrong speed or stop functioning entirely.
What common symptoms indicate you may need to replace the Speedometer Cable?
- Speedometer needle drops repeatedly while driving at slow speeds
- Speedometer needle vibrates or behaves erratically at high speeds
- Speedometer squeaks and squeals at high speeds
- Check Engine Light indicates a faulty speedometer sensor