Speedometer cable or digital in 2021 Gladiator? | 4WDTalk - Overlanding and offroad Forum
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Speedometer cable or digital in 2021 Gladiator?

Your 2021 Jeep Gladiator's speedometer does not have a cable running it. Instead, it uses a sensor and electronics to determine the vehicle's speed. The sensor is located on the transmission and sends signals to the Gladiator's electronic control module (ECM), which then calculates the speed and sends that information to the instrument cluster to display on the speedometer. This is a common setup in modern vehicles, as it is more reliable and accurate than a mechanical cable system. Hope this helps.
 
If the speedometer on your 2021 Jeep Gladiator has stopped working, there are a few things you can troubleshoot to determine the issue:

  1. Check the speed sensor: The speed sensor on the transmission could be faulty or disconnected, which could cause the speedometer to stop working. Inspect the wiring and connections to ensure they are in good condition and securely attached.
  2. Check the fuses: A blown fuse could cause the speedometer to stop working. Check the fuse box for any blown fuses and replace them if necessary.
  3. Check the instrument cluster: If the speedometer is the only gauge that is not working, it could be an issue with the instrument cluster. Try resetting the cluster by disconnecting the battery for a few minutes and then reconnecting it.
  4. Check the ECM: The Electronic Control Module (ECM) could be faulty, which could cause the speedometer to stop working. A diagnostic scan tool can be used to check for any error codes stored in the ECM and troubleshoot accordingly.
If you are unable to determine the issue yourself, perhaps have a professional look at your rig. Good luck!
 
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