To troubleshoot, you need to consult your owner's manual. It will have a fuse box diagram showing which fuses protect the instrument panel/gauge cluster (which includes the speedometer) and other related circuits like the body control module (BCM). You'll likely find several fuses that *could* be related. Check those fuses first. Do this with the ignition OFF.
Important Considerations:
* Multiple Fuses: Several fuses might relate indirectly to speedometer function, such as those controlling power to the instrument cluster itself or the communication between the cluster and the vehicle's computer.
* Instrument Cluster Issues: A blown fuse might be a symptom, not the root cause. A faulty instrument cluster itself is a common reason for speedometer problems.
* Professional Diagnosis: If you've checked all related fuses and the speedometer still doesn't work, you'll likely need a professional diagnosis from a mechanic or auto electrician. They have tools to properly test the circuits and components involved.
In short, without your owner's manual, I can't tell you which specific fuse to check. Find your owner's manual and look for the fuse box diagram. It will be your best guide.
