I have a 1981 XJ6 and it has mechanical speedometer and placed a drill on the input and no reading on the gauge. I traced the cable to a white plastic box on the firewall the cable goes in this box and come out and goes to the front of the engine. I assume it goes around and into the instrument panel . I have not got that far yet. What I want to know is what is this plastic box it has a plug also but was not plugged in anything. I am assuming that the spedo cable is bad somewhere . Thanks for any input. Jerry P.S. it was working a week ago.

 

The box is the "Intervalometer"...or some silly name like that. Every 30,000 miles an internal switch closes to turn on the oxygen sensor warning light. There's a reset button on the box to restart the count.

Most people get a one piece replacement cable and ditch the box

Cheers
DD

 

OK that make it easy I will ditch the box, where can you get a male to male connector to connect the 2 cable drives, or t you just replace the hole cable. Thanks Jerry

 

Not sure about a connector. The usual thing is to just buy a new, single cable. I would contact 'one of the usual' Jag vendors (SNG Barrat, Jagbits, Coventry West, Welsh, etc). they should be able to fix up up

Cheers
DD

 

Ok thanks, look like it is the box that is bad, when I hook the drill up to the cable going into the car the speedometer works. Thanks Jerry