Hello. The odometer and trip odometer on my XJS stopped working. The speedometer works and the trip computer works. I pulled out the instrument cluster, lubricated the odometer and cleaned the electrical connections. Still no luck. Any suggestions?

 

From your description, it sounds like the internal gear is at fault. They are plastic and can crack with age.

Not sure where you are located, but if you have a speedometer shop nearby they can either fix it or provide the proper plastic gear. If you don't have one locally, you can contact Palo Alto Speedometer and they should be able to help.

Palo Alto Speedometer: Repair, Restoration, and Sales of Automobile Gauges

 

As its often really important where in the world the car is, l was just thinking wouldn't be great if there could only be a way to put that information on the posts......

 

I don't think it's a mechanical problem, because the odometer turns correctly if I manually turn the primary gear.

What is this electrical component and is it possible that it has failed? Is there a way to test it?