Why is your speedometer not working on your 1988 jaguar?

The speedometer in your 1988 Jaguar may not be working due to a malfunctioning speed sensor, a broken speedometer cable, or issues with the instrument cluster itself. Additionally, problems such as a blown fuse or wiring issues could also affect its functionality. It's advisable to check these components systematically to diagnose the issue. If you're uncertain, consulting a mechanic with experience in classic cars may be helpful.