+ve earth rev counter into -ve

[Benspickup]

Im not certain where to get the information for this so i thought i would try on here- I've had in my possession a smiths rev counter that i want to put in my mini pick up as i feel its more in keeping than modern ones- it is however positive earthed but is for a 4 cylinder. Is it easy enough to wire it in for its new -ve earth application? Are there any diagrams avalible? Thanks, Ben

[Perd Hapley]

http://mgaguru.com/mgtech/electric/et202a.htm

It's doable on at least some of them, although in my case I found it easier just to buy a negative earth one on eBay. But mine was a common Spridget one so I was spoiled for choice.

[cold thursday]

Instructions here :-

http://mk1-performance-conversions.co.uk/smiths_im...

[shambollic]

You would probably be better off financially selleing the +ve earth one and buying a -ve earth one. I needed a 6volt +ve earth one, and ended spending a small fortune on one.

[cold thursday]

It is a very easy thing to do.

[Benspickup]

Thanks very much- seems simple enough to do. Only thing i am wondering about is the pulse lead. On my rev counter it only has one lead held by a screw, not two as in the diagram