Speedo

[Burney]

Hi

I have a smiths speedo is it just the one big cable goes to the back of it or is the spade on the back needed to ground?

[magh]

Is that the ground for when the backlight bulb is fitted into that hole? 

[brumster]

I'd agree, it just looks like an earth tab for if you're using a backlight and the clock isn't mounted into something conductive (say a plastic/grp dashboard). Not essential for it functioning as a speedo.

[Burney]

Thanks folks I'll try that out