Hi fellow jag fans
I am in the final stages of converting my 85 XJS HE to manual transmission and I need to pick someones brains on how to sort out a speedometer.
I have fitted a Getrag box out of a 3.6 (which I wouldn't recommend to the faint hearted), and recognising early that this gearbox doesn't have a speedo drive, I also fitted a 3.6 diff with a speedo pick up. However, the pick up on the diff has 3 wires, whaereas my car has only 2. I read on the web (a book which someone in the US has put together on the XJS) that all later XJSs were fitted with a diff pick up, but an interface module is required because the later pick ups produce the wrong sort of signal for the speedo, computer and cruise control
If I get hold of an interface module out of a late XJS, will it put out a signal which my car can use, or do I have to change the speedo, computer and cruise unit?
Steve Shuttleworth