Well, I don't have that problem because my tach is mechanical drive.
Yours is electric and requires you to take it out of the instrument
panel , I believe take the tach rear cover off and "reverse" the coiled
wire located inside. At one time there were detailed instructions on how
to do this in a Moss Motors catalog or magazine. Perhaps someone can
help you with that. I don't know the exact process.
Brian Warmuth
Maffei Andrew P SSgt 27 LG/LGQPT wrote:
>
> Someone did that to my 66B, I think it was when they swapped the generator
> to an alternator. now I don't really know how it's done, but the only
> problem now is the original tach will not work at all, and I have tried.
> if anyone out there knows how to fix this please let me know ( and yes I did
> try swapping the wires at the coil)
>
> > -----Original Message-----
> > From: Brian Warmuth [SMTP:warmuthb@WLSC.WVNET.EDU]
> > Sent: Friday, June 23, 2000 6:28 AM
> > To: mgs@autox.team.net
> > Subject: Pos to neg
> >
> > I suppose this topic has been covered before and there are probably some
> > web-pages which deal with the specifics of the process, but I would like
> > to convert my MGA from the positive ground to negative ground
> > arrangement. I believe it is fairly easily done, but does anybody have
> > a step-by-step? It has the original fuel pump, however I have a rebuilt
> > one (converted to operate on negative ground) to install. Since the car
> > has no "electrical" gauge do you just switch the battery ground, switch
> > the coil wires, and re-polarize the generator?
> >
> > Mucho TIA!
> > Brian Warmuth
> > 52 TD (Rhd), 58 ZB, 59 MGA (1500), 60 Farina Magnette
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